@Mornec if you have same wifi profiles saved earlier then delete and reconnect again as fresh/new. Do you have DNS setup on phone which conflicts, VPN. If you have enabled secure wifi then dissable...

Unfortunately I can't help you with Proxmox but I suggest you to turn off one by one and to close possibilities what causes problem.

@ComfySofa you can try my fix. It may work.

@ComfySofa It looks very similar issue to mine. I found "partly" fix look in my thread. https://community.tp-link.com/en/home/forum/topic/731754

@ComfySofa can you give Dell Precision laptop model?

@skyfx64 On your AX73 looks ok, but what does it shows/set on other device?