Same here Iphone 11 pro after updating to 14.3 wifi keeps randomly disconecting and automaticly reconecting. The problem is that phone shows its connected to wifi but it still doesnt work then for another 30 seconds and when it starts its keep disconnecting every 10 minuts which is really annoying for this expensive phone... Upgraded from samsung which had no problems whats so ever. Tried everything even bought 2 new routers which did not solve problem.