I just spoke with a senior advisor at Apple where I demonstrated the issue via ScreenShare, provided a CaptureData dump, and did some additional testing an isolation (e.g. when an external keyboard modifier key is pressed, the internal trackpad exhibits the issue, but an external trackpad does not exhibit this issue under any circumstances). Here are a few takeaways:
- The advisor I spoke with was not able to find any existing issues, but might be directed to something once the engineering team takes a look at the fully compiled report.
- Using the full “click” on the internal trackpad works normally for me. It is only the “tap to click” that has an issue with my configuration. This may or may not be the case for others.
- This works with ANY key—e.g. in a text field, press and hold a letter key (e.g. “z”) and quickly tap elsewhere in the field to move the insertion cursor. These taps will be ignored for the first few hundred milliseconds as with modifier keys.
For posterity, I am on an MBP 14" M1 Max running macOS 12.1 and have been experiencing this since I received the computer in early December.