We had our hosting provider disable VARNISH caching, this was causing the issue.

I found out how it works, it's the plugin WPForms that stores a wpforms-peding status in the db. I'm checking if I can watch for changes to this value and trigger an email when it happens! Thank for you explanation! Very helpful if I ever need to construct this myself from scratch!

I found that WP Forms add a field wpforms-pending to the wp_user_meta table, so this is probably the field I'm looking for. This issue is not solved as it not a WordPress core issue. Thanks for your help.

Hello there, I just found out that WP Forms (plugin) adds this functionality, so I'll probably have to contact them.

Yea, it was both plugins interfering with eachother. I've narrowed it down a bit to much in the User Role Editor :D I flagged as accepted!

BTW, I don't have enough rep to upvote, otherwise I would've upvoted your answer.

I managed to do it the way you've given me. Big thanks for that. I discovered something weird. Trying to fix that right now. For example: I let the account view pages, but I have a plugin to reorder taxonomies, and I only disable "Taxonomy Order", the weird this is, it shows me Taxonomy order in the menu, and disables something else from the menu. :D - Oh my bad,t his might have to do with certain settings in User Role Editor plugin, Imma find that out

Hey! Thanks man. I will try this out and let you know how it went!