Touch screen won't respond in Android after playing in multi-player

In our game “Skate & Strike” on Android platform; after playing one or a few levels in multi-player mode, buttons, text fields etc won’t respond to first touch. Only way to use buttons become touching somewhere else and tapping a button with another finger.

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks

We switched our project directly from 4.15 to 4.20 and problem looks resolved in 4.20 or below.