No Haptic Feedback on Magic Trackpad 2 and missing settings
I have a Magic Trackpad 2 with a 2015 iMac running 10.13.6 High Sierra and the haptic feedback just stopped out of the blue. I checked in the trackpad settings and the checkbox for Silent Clicking and Force Touch & Haptic Feedback are missing in the Trackpad Settings pane. Force Touch does appear to still work.
I took it to a friend's house and connected to their iMac and immediately Haptic Feedback worked. The checkboxes mentioned above were still missing, but their iMac was running 10.10.5 Yosemite, which technically doesn't fulfill the system requirements for the Magic Trackpad 2, so that may be the reason.
When I got back home, I turned the trackpad on and the haptics worked again, although the missing settings were still missing. It lasted for about 5 minutes, then quit again out of the blue.
I've seen several posts about this missing settings since 10.13.6 was released. Is this a known bug? I've tried resetting the PRAM and the SMC (unplug for 15 seconds, plug back in for 5 seconds, then press the power button to turn on), but to no avail.
Any ideas out there? Is there some plist or settings file I could delete that may be corrupted?
Thanks, Dan