Replacing secret TLS certificate in MY K8S environment does not take effect

The certificates I serve are secret TLS certificates created in different namespaces ,Now I manually delete them and create a new Secret TLS with the CRT and key of the new certificate ,But they won't take effect. The accessed certificate is the old certificate.,This problem has been bothering me for days,Hope to get your help, thank you,Even weirder is that they are sometimes valid and it is possible to access new certificates ,It's not the browser. I clean the cache every time I visit,But in my pre-live environment it didn't work at all,I use traefik2.2.8 .