ID 498306 - Click and holding toolbar group buttons with a Wacom pen does not reveal the pop-out selection menu when Windows Ink is enabled

Problem summary
Click and holding toolbar group buttons with a Wacom pen does not reveal the pop-out selection menu when Windows Ink is enabled

This issue occurs when Windows Ink is enabled in the tablet driver settings.

Customer reported version
Mari 5.0v1

Customer reported platform
Windows 10

Steps to reproduce
1) Open Wacom Tablet Properties

2) Under the Calibrate or Mapping tab, ensure that the Use Windows Ink checkbox is ticked

3) Launch Mari and open any project

4) With a Wacom pen tablet/display, click and hold any of the tool buttons in the Tools toolbar

Expected behaviour
The tool's pop-out menu should show to offer additional selections, so for example, if you click and hold the Paint tool, a menu should should be shown with the Paint, Blur, Paint Buffer Eraser, and Vector Paint tools.

Actual behaviour
The pop-out menu does not appear.

Workaround
A custom toolbar can be created and populated with the various tools that are normally hidden within the group buttons. These will require a single click to activate, rather than a click and hold.
Information on creating custom toolbars can be found in the documentation page linked below:

Mari User Guide: Creating Custom Toolbars

Reproduced by support
Mari 5.0v1 - Windows 10
Mari 4.8v1 - Windows 10 - regression

Unable to reproduce bug in:
Mari 4.7v5