A licensee reported an issue where mouse events are not able to be used as touch events on Android apps. This was specifically reported on and tested on Chromebooks. After working with Chris Babcock, it was discovered that this was able to be worked around by changing the following If condition in LaunchAndroid.cpp to be false and skip the following block of code:
This is not a valid solution for the issue however and this report has been entered for a solid fix.
This did not happen in 4.19.2, but does occur in 4.20 and thus is not a regression at this time.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-71709 in the post.