hey jordan,
thanks for your suggestions, couldn't find the time to answer untill now Image may be NSFW.
Clik here to view.
i tried to connect to access point on mobile and at work, seemed to work fine. Tested with mobile for a couple of ours.
I had a closer look on the TP-Link(s) you provided and did some of their troubleshooting suggestions,
reconfiguered rooter again did another FW update. Enabled Flooding protection an a few more things.
Can't remember all of them at the moment Image may be NSFW.
Clik here to view.
It works now since thursday i guess, but I'm still in the "one week doing fine" window and a bit sceptic.
But at least it seems the problem is the combination of router and wifi card in the S13, mainly it seems to be the TP Link Archer.
If it starts failing again, I'll go on and disable the 5GHz network and will try with fixed single band operation.
thanks again for your effort!
br