I have an app running on Windows tablets. In some situations, possibly with more complex drawings, touch on the app becomes disabled once the ViewportLayout has been loaded. I load the ViewportLayout on demand creating the UI on demand. Before this all buttons operate as normal with touch triggering the Command binding. Once the ViewportLayout is loaded then the buttons no longer trigger the command binding. They are still picking up touch up and touch down events. This is also intermittent - happening about 75% of the time with one example drawing. Buttons work ok if a stylus/mouse is used. I'm currently still on version 2021. I'm happy to try 2022 if this is likely to help.
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