iOS Safari logs me out of Google, but only on my primary profile

Hello,

I have two profiles on Safari: the primary one created by default when you use the browser for the first time (which I turned into the personal one) and a secondary one I created manually (which is now my work profile).

The primary one constantly (at least once a day) logs me out of Google, but only on my iPhone 15 Pro Max running iOS 18.2.1.

I tried everything: turning off "Prevent Cross-Site Tracking", turning off Private Relay, turning off all my ads-block extensions, disabling the native content block, turning off developer mode, turning off "Block All Cookies"...

To trigger it, I just need to close the Safari app on my iPhone, then reboot my iPhone. Sometimes it will need two reboots, but some other time it will log me out right after one reboot.