It looks like not all is fine and dandy with iOS 13. At least two popular games are no longer playable on iPhones running Apple's latest version of the operating system. Fortnite and PUBG developers have already issued a warning for those who still want to play their games that they should not update to iOS 13 yet.
reports, most of the issues that make these games unplayable are related to gestures. The triple-finger tap-and-hold gesture seems to be bugged to the point that it steals touches from the game. Any game that requires players to have three fingers on the display seems to be affected by the gesture bug.
PUBG developers have already included an announced in their game that warns players about the issue and advises them to prevent their iPhones from installing the iOS 13 update. The announcement also confirms a fix is in the works.
We are aware of an issue for players who upgraded to iOS 13, where touching the screen with 3 fingers will trigger an iOS function and interrupt the game. We have already raised the issue with Apple, and we will continue working with them to resolve the issue. We suggest players who play the game with 3 or more fingers do not upgrade to iOS 13 until the issue is resolved.
The only workaround for the issue would be to completely disable the gesture, which is not possible at the moment. A patch might be included in iOS 13.1, which is scheduled to arrive on September 24, but that's just a guess.