Wifi on my Pixel 6a started keep on disconnecting and reconnecting itself.
Sometime its showing access point is full, then i need to manually click on the connection and its connecting again.

My Wifi is dual band (supports 2.4 and 5GHz)
Tried turning off VPN and Private DNS ,still same issue.
Changed randomized mac to per network.

iPhones, android phone with lineageos and laptops (both linux and windows)in my home don't have this issue.Can anyone help me on this.

So my pixel 8 pro is doing the same thing since last update. I thought it was my network. I sent hours tweaking stuff and optimizing channels on my APs thinking my phone was disconnecting due to congestion or interference. Still randomly disconnecting and connecting. Some times I have to manually go back in and click the network to connect again. My laptop and chromecasts have not had this issue.

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My phone was doing this about 6 months ago. In my case it was nothing to do with GOS or any updates.

I had uninstalled Google Play Services just to see what a non-googled device would be like.
After a few days I installed Google PS again and that is when my phone wouldn't keep a wifi connection.
I've heard if GPS isn't installed first there can be issues.
Signal was the only app that gives me a warning if GPS isn't installed so I removed Signal.
That did the trick.

4 months later

Guys, I'm not sure if my problem is related to yours but it seems quite similar.

Pixel 8 Pro without any Google stuff.
It works fine with my home WiFi network but if I enable Proton VPN, it continuously disconnects and reconnects to the WiFi. It stay connected just for a couple of seconds, though.