Hello Chouby,
Thanks for your fast answer.
I’m sure you don’t reproduce it, as said in every threads about this issue, if you empty the cache, or visit the site for the first time, you don’t have this issue.
The auto redirection with the browser language is an interesting functionnality, I can put it manually in the htaccess, that’s very easy, but I think it’s a shame that doesn’t work in polylang.
I would be glad to help you debug it.
Kind regards