I've been experiencing SSH disconnects and freezes ever since I got my Raspberry Pi 3A+. I connect to the 3A+ from my Windows machine using SSH over WLAN, and after about 5 - 10 minutes it hangs or disconnects with

client_loop: send disconnect: Connection reset

or sometimes with

Connection reset by {address of my RPi} port 22

If I try to reconnect, I get "Connection timed out", and if I ping "Destination unreachable". I usually have to either restart my PC (doesn't always help), or wait a while in order to connect again.

Some details:
-After one machine disconnects, connecting from another one still works, and the rpi itself is unaffected
-Disconnections happen on every device I own
-Connection seems to remain indefinitely if I don't do anything

I tried:
-Changing port
-Disabling wifi power managment on the RPi
-Disabling TCPKeepAlive
-Disabling Windows firewall