Fix WordPress / custom login with cloudflare and caching

When you login to my website (using Discord social login) there are issues due to cloudflare / cache. The user list navigate to a few different pages before actually being logged in. (There are also issues logging out). I'd like to fix this. Please note I am also using WordPress cloudflare apo and I don't want to disable it (disabling it didn't fix my problem).

Ubuntu / Nginx server