No warning message displayed

Hello Jason,

I saw this question multiple time in this forum but I don’t find any answer. Everything is in the title.
I’ve tried disable all plugins responsible for redirect on my site, cache plugin, etc … to no avail. User is being disconnected but no warning message.

The get_redirect_url seems bypassed somehow.

Any idea which function I should look for in my site to pinpoint the problem?

Thanks a lot!