Odd behavior with Start11, Fences, and Multiplicity

I am experiencing some extremely odd behavior on a tablet computer.

This might be related to https://forums.stardock.com/524341/page/2/#3913107

Computer

• Windows 11 Home Insider Preview (system reset 1 December)
• Version 22H2 build 23595.1001
• Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz 2.11 GHz with 16GB RAM

Installed Stardock applications

• Start11v2
• Fences
• Multiplicity

With an attached mouse or using Multiplicity with a mouse from my primary computer:

• Start Button works as expected.
• Clicking an item on the Task Bar works normally.
• Clicking a collapsed app on the task bar restores normally.

Using touch screen:

• Start Button usually does not work. Occasionally it does, but never on the first tap.
• Clicking an item on the Task Bar opens two (sometimes three) instances of the app.
• Clicking a collapsed app on the task bar restores and immediately collapses.

As a result, the computer is unusable as a tablet. Proper operation occurs only when I use either a local mouse or a remote mouse via Multiplicty.

I have spent hours over the weekend trying to troubleshoot this, but I haven't been able to find anything.

Some observations:

• Disabling custom start button sometimes restores normal operation. Not reliably repeatable.
• Disabling Start11 usually (but not always) restores normal operation.
• Switching between Start left/Task Bar center, left aligned, and center aligned sometimes has an effect, but is also not repeatable.