My S23 is stuck in a WiFi connection loop

[SpiderFlameTypeY]

I honestly have no idea where to post this, so if I got it wrong, please correct me. My S23 will get stuck in a loop (Connecting -> Checking quality -> [sometimes] Connected without internet -> Available Network) when connecting to my home wifi. Hotspots work just fine and Ive tried all the basic troubleshooting, and looked at all the old threads, but nothing helped.

Phone is a Galaxy S23, OneUI 6.1, Android 14, Kernel 5.15.123
Router is an Arcadyan KVD21 Gateway from TMobile, WiFi 6

Some things I tried:
Rebooting the router
Rebooting the phone
Booting the phone into safe mode
Airplane mode + WiFi
Forgetting the network
Static IP adress
Connecting to the router on other devices (works)
Testing network speed (100mbps on pc)
Checking WiFi on/off history
Using phone MAC address
Checking for software update
Using 2.4GHz and 5GHz

 

[SpookDroid]

Sounds like the issue is with your router, not the phone.... Do other devices have issues connecting to it? Have you tried checking to see if there are any updates to the router or anything that may have recently changed? If you have too many devices connecting to the router it may be 'kicking out' the device. Additionally make sure that 'Intelligent WiFi' is turned off to ensure it's not disconnecting due to poor connection conditions. Last step I'd try is to change the router's channel to a less noisy one or enabling a guest network (or changing the name of the existing one) to see if that keeps the phone connected to it.

 

[SpiderFlameTypeY]

Sounds like the issue is with your router, not the phone.... Do other devices have issues connecting to it? Have you tried checking to see if there are any updates to the router or anything that may have recently changed? If you have too many devices connecting to the router it may be 'kicking out' the device. Additionally make sure that 'Intelligent WiFi' is turned off to ensure it's not disconnecting due to poor connection conditions. Last step I'd try is to change the router's channel to a less noisy one or enabling a guest network (or changing the name of the existing one) to see if that keeps the phone connected to it.

Other devices connect to it just fine.
Firmware is latest version.
Intelligent WiFi is disabled on my phone.
Ill try the other two options and get back on that.

 

[SpookDroid]

The most common one is the router channel (it was especially bad between TPLink routers and S7 through S9 phones), so let's hope that helps. Changing the network ID would just force the phone to create a whole new connection (just in case forgetting the previous one still retained some settings or something). And I forgot, but check that your phone doesn't have any VPN apps running or that it, somehow, got its IP settings changed to static instead of dynamic (especially the DNS).