11 lines
609 B
Markdown
11 lines
609 B
Markdown
# WPF Touch Stops Working After Rapid/Prolonged Use Of Popups
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## Symptoms
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On a touch or stylus-enabled machine, WPF applications may see a loss of touch or stylus after rapid or prolonged use of popups (e.g. ComboBoxes, DropDown Menus).
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## Cause
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A change to disposal of HwndSource in .NET 4.7 caused Popups to not correctly cleanup touch resources. This eventually can lead to loss of touch/stylus interaction.
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## Resolution
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This issue is fixed for all supported OS platforms prior to Windows 10 Fall Creators Update. The fix for Windows 10 Fall Creators Update is expected in a future servicing update.
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