https://wccftech.com/ios-12-2-apparently-fixes-the-glass-screen-protector-issue-affecting-11-inch-2018-ipad-pro/

Annoyed by the tempered glass screen protector touch responsiveness issue on your 11-inch iPad Pro? Then you might want to upgrade to iOS 12.2.

If you recently bought a 11-inch iPad Pro, the 2018 model, then you might have realized that the tablet behaves in a very odd way when you apply a tempered glass screen protector. The screen goes haywire and fails to register touches occasionally until or unless you touch the frame of the iPad while going about your business.