2017 Macbook Pro (no touch bar) user here
So it seems that this issue is happening across a diverse range of hardware, with or without bluetooth (my gen1 magic trackpad produces the same unreliability issues as my onboard trackpad, but turning off bluetooth doesn't help), and it seems like laptops with the same configurations can either be affected or be entirely fine.
So,
one big question: Has anybody with this issue tried a
clean install, then
logging in with a brand new Apple ID? Because when I installed Monterey, it imported all my configuration selections which date back years and might have some legacy options selection that don't jive well with the new OS for whatever reason. And I presume that when you buy a new M1 macbook and log in with your existing apple ID, it'll still pull your old configuration selections, possibly triggering the same sort of bug.
So if someone experiencing this issue has the time to do a fresh install and log in with a fresh Apple ID, I'd be very curious to hear if the problem persists, even with all the default configuration options.
p.s. here's an easy way to reliably diagnose this issue:
- Go to a 'click counter' site like
https://www.rapidtables.com/tools/click-counter.html
- Put the cursor over the counter button, close your eyes, and count out 50 taps on the trackpad
- Open your eyes and look at the number of taps registered - it's always one or two short of 50 for me
Update: it looks like you can log in to a new installation without using an Apple ID by skipping that prompt when it appears, so that would simplify things if anyone can try this.
I did try creating a new user account, and I logged into that without signing-in with an Apple ID, but the issue existed even with the new user account.
That said, I think this is still worth trying on a clean install with a machine experiencing this issue - just make sure to avoid signing-in with an Apple ID so that no old settings are imported.
Update 2: I've tried resetting the NVRAM and SMC, yet the problem persists