WiFi Disconnecting Constantly on iOS 18

Since updating to iOS 18, my device frequently disconnects from WiFi without any apparent reason. This issue happens multiple times throughout the day, even when I am close to the router with a strong signal. While I experienced already many times WiFi disconnections in previous iOS versions, the problem has become constant and significantly worse since the update. Other devices in my household, including Android phones, do not experience this problem, so it seems to be specific to iOS.

It's absolutely infuriating—I can't believe such a major company has such basic UX problems.