quick recap of what I did.
Disabled Mac address randomization.
Disabled IPv6
Follow the solution of this thread step-by-step:RTL8821CE - When idle, wifi drops and works only after reconnecting - #14 by tbg
contacted internet provider and they fully restarted my router settings.
UPDATE: connection cut still happened. This time I detected it with steam while playing online game for testing reasons. I got disconnected and after clicking WiFi icon magic happened and I got reconnected.
UPDATE:So after connection cut my device was not even detecting internet connection so I had to Snap back.