Highlight issue on Safari iOS

Hi!
Unfortunately me and other developers faced an issue when play GDevelop games in Safari on iOS.

Steps to reproduce:
1 publish a game on gd.games
2 press the standard gd.games button to make fullscreen
3 during the game make Long press on left part of the screen

Actual result: the whole game screen is highlighted with blue color.

Link to my wip project: