forwardauth.maxBodySize and forwardAuth.maxResponseBodySize have not been able to bet set

Traefik Traefik v3 (latest)
1

I am using the middleware for the crowdsec Bouncer:

EntryPoint Websecure:

websecure:
  address: ':443'
  http:
    middlewares:
      traefik-crowdsec-bouncer@file

Definition Middleware

http:
  middlewares:
    traefik-crowdsec-bouncer:
      forwardauth:
         address: http://traefik-crowdsec-bouncer:8080/api/v1
      forwardAuthtrustForwardHeader: true
      maxResponseBodySize: 32768
      maxBodySize: 1048576

If I now look in the middleware traefik-crowsdsec-bouncer MaxBodySize will be written with -1.
Also if I will fetch via API - same result. But the middleware is working - almost

As written here:

The configuration should be correct.
Error in traefik.log:

2026-06-28T14:55:37+02:00 WRN maxResponseBodySize is not configured, allowing unlimited response body size which can lead to DoS attacks and memory exhaustion. Please set an appropriate limit. entryPointName=websecure middlewareName=traefik-crowdsec-bouncer@file middlewareType=ForwardAuth routerName=suche-ip@docker

yamllint checks the file correctly - and traefik dashbord and site are working.