Screen Tearing in packages created with UE4.18

In UE4.18.2 , when I create a package with shipping mode, the package gets created with fullscreen mode as default even when I have not written any blueprint for fullscreen and this package shows screen tearing on monitor.

This screen tearing appears only in shipping mode but not in development package. Development Package works fine.

I also found the solution ie. pressing Alt+Enter, which solves the tearing problem but only if my screen is connected via a normal HDMI cable to my CPU, if I am using a d-port to HDMI convertor, Alt+Enter does not help.

Anyways, in earlier versions of UE4, there was no such problem in any kind of packages, it’s happening only in UE4.18.

Please fix this bug and provide an update.