On further testing, this bug is specific to a touchscreen that is not perfectly (which is usually the case if calibrated manually from Settings>Display>Calibrate). The touch input location is translated to a point that is _just_ outside the bounds of the external screen.

malaykesha@, why I can not repro the issue according to the repro steps? And what's settings>display>calibrate? Why I can not found it in the settings>display? (I didn't try it through multiple physical displays, what I did is to simulate two displays in Linux).

#4 
I havent tried this on linux. But you can try the following:
 - Translate the mouse clicks as touch via "--touch-devices"
 - Enable "--enable-touch-calibration-setting" to view the settings for the external monitor.

The calibrate settings is only visible if the system detects a touchscreen. But I am not sure how this would work on linux.

This seems to be happening due to the GestureRecognizer falling back to the internal display incase the Swipe (or scroll) gesture event location lies outside the bounds of every screen.

Will have to look into it further.

This was set to P1 but can't be easily reproduced? Is still an issue? Should the priority be lowered? Is seems very specific in that is will only happen if a device is manually recalibrated improperly? Should it actually be a WontFix in that case?

rewarding the initiative

This one is difficult to reproduce, at least for me. The video shows a clear example, so I'll leave it open. I'm also not seeing a lot of listnr feedback about this right now.

Removing myself

This is not a P1, trust me.

Downgrading to P3 as the use case seems to be somewhat exotic