Hi

We are currently testing our applications on Windows 10 preview builds. We discovered a problem with Windows desktop applications when it comes to touch.

When executing a certain order of touches (see below), touch points get stuck in the ‘touch move’ state. The most likely reason is that the ‘touch up’ events are not registered. But it might as well be an issue in the IDs of the touch points.

To create the issue, the following actions are performed:
Touch with finger 1. Keep this finger on the screen. Touch with a number of other fingers. Keep these on the screen. Release finger 1. Touch again with finger 1. From this moment, the touch points connected to the other fingers will be stuck in the ‘touch move’ state.
Here is a movie to show the above action:
https://youtu.be/A0ayJlq-rxQ

Is this issue already known at Adobe?
Are there other people experiencing this issue?
Is there a workaround?

Additional info:
The problem only happens on Windows 10. Lower Windows versions don’t have this issue.
We have Unity based desktop applications which have the same issue. The Windows 8 Store App builds of the Unity apps don’t have the issue. Indicating the problem might be originating from the Windows 10 desktop.

A simple WPF multi touch test application (for desktop) does NOT have the problem.

Sincerely,

Jens Wouters
Developer at Omnivision Studios