ACME Cloudflare not working after 3.7.6+

Traefik Traefik v3 (latest)
,
1

Hi guys,

After I upgraded to version 3.7.6+ (Noticed this the first time in 3.7.8) I see the behavior in the log below. The behavior seen in the log goes away if I revert to version 3.7.5.
If you need more info let me know.

traefik  | 2026-07-26T09:38:36Z WRN **Traefik can reject some encoded characters in the request path.When your backend**
 **is not fully compliant with \[RFC 3986\](https://datatracker.ietf.org/doc/html/rfc3986),it is recommended to set thes**
**e options to \`false\` to avoid split-view situation.Refer to the documentation for more details: https://doc.traefik.**
**io/traefik/v3.7/migrate/v3/#encoded-characters-configuration-default-values** 
traefik  | 2026-07-26T09:38:36Z INF **Traefik version 3.7.8 built on 2026-07-15T12:43:11Z** version=3.7.8 
traefik  | 2026-07-26T09:38:36Z INF  
**traefik  |** Version check is disabled. 
traefik  | You will not be notified if a new version is available. 
traefik  | More details: https://doc.traefik.io/traefik/contributing/data-collection/ 
traefik  |  
traefik  | 2026-07-26T09:38:36Z INF **Stats collection is enabled.** 
traefik  | 2026-07-26T09:38:36Z INF **Many thanks for contributing to Traefik's improvement by allowing us to receive** 
**anonymous information from your configuration.** 
traefik  | 2026-07-26T09:38:36Z INF **Help us improve Traefik by leaving this feature on :)** 
traefik  | 2026-07-26T09:38:36Z INF **More details on: https://doc.traefik.io/traefik/contributing/data-collection/** 
traefik  | 2026-07-26T09:38:36Z INF **Starting provider aggregator \*aggregator.ProviderAggregator** 
traefik  | 2026-07-26T09:38:36Z INF **Starting provider \*file.Provider** 
traefik  | 2026-07-26T09:38:36Z INF **Starting provider \*traefik.Provider** 
traefik  | 2026-07-26T09:38:36Z INF **Starting provider \*docker.Provider** 
traefik  | 2026-07-26T09:38:36Z INF **Starting provider \*acme.ChallengeTLSALPN** 
traefik  | 2026-07-26T09:38:36Z INF **Starting provider \*acme.Provider** 
traefik  | 2026-07-26T09:38:36Z INF **Testing certificate renew...** acmeCA=https://acme-v02.api.letsencrypt.org/directo
ry providerName=cloudflare.acme 
traefik  | 2026-07-26T09:38:37Z INF **Renewing ACME certificate: {Main:\*.dhjensen.tech SANs:\[\]}** acmeCA=https://acme-v0
2.api.letsencrypt.org/directory providerName=cloudflare.acme 
traefik  | 2026-07-26T09:38:37Z INF **Trying renewal.** domains=\*.dhjensen.tech hoursRemaining=408 lib=lego 
traefik  | 2026-07-26T09:38:37Z INF **Obtaining bundled SAN certificate.** domains=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:37Z INF **Use solver.** domain=\*.dhjensen.tech lib=lego type=dns-01 
traefik  | 2026-07-26T09:38:37Z INF **dns01: preparing to solve the challenge.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:38Z INF **dns01: trying to solve the challenge.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:38Z INF **dns01: waiting for record propagation** domain=\*.dhjensen.tech interval=2000 lib=l
ego timeout=120000 
traefik  | 2026-07-26T09:38:40Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:42Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:44Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:46Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:48Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:50Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:56Z INF **The server validated our request.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:56Z INF **dns01: cleaning DNS-01 challenge.** domain=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:56Z INF **Validations succeeded; requesting certificates.** domains=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:57Z INF **Server responded with a certificate.** domains=\*.dhjensen.tech lib=lego 
traefik  | 2026-07-26T09:38:57Z INF **Renewing ACME certificate: {Main:\*.dhjensen.dk SANs:\[\]}** acmeCA=https://acme-v02.
api.letsencrypt.org/directory providerName=cloudflare.acme 
traefik  | 2026-07-26T09:38:57Z INF **Trying renewal.** domains=\*.dhjensen.dk hoursRemaining=408 lib=lego 
traefik  | 2026-07-26T09:38:57Z INF **Obtaining bundled SAN certificate.** domains=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:38:58Z INF **Use solver.** domain=\*.dhjensen.dk lib=lego type=dns-01 
traefik  | 2026-07-26T09:38:58Z INF **dns01: preparing to solve the challenge.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:38:58Z INF **dns01: trying to solve the challenge.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:38:58Z INF **dns01: waiting for record propagation** domain=\*.dhjensen.dk interval=2000 lib=leg
o timeout=120000 
traefik  | 2026-07-26T09:39:01Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:03Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:05Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:07Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:09Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:11Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:13Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:15Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:17Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:19Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:21Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:23Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:25Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:27Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:29Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:31Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:33Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:35Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:37Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:39Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:41Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:43Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:45Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:47Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:49Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:51Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:53Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:55Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:57Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:39:59Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:01Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:03Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:05Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:07Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:09Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:11Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:13Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:15Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:17Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:19Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:21Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:23Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:25Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego 
traefik  | 2026-07-26T09:40:27Z INF **dns01: waiting for record propagation.** domain=\*.dhjensen.dk lib=lego
2

I recommend you place your code/log between 3 backticks and not use the quote function.

What is the issue? It’s waiting forever?

3

It have been ticked.

I see that I didn't read my own logs properly. The dhjensen.tech domain eventually renews succesfully while the dhjensen.dk does not. It eventually times out(Not in posted logs)

But since upgrading to version 3.7.6 and newer I have seen issues with the dhjensen.tech domain as well. It also times out.