@MoonshineSG No worries, frustration also begins with an "F" :), sorry you had to experience that. Doesn't sound like fun.
Just to be clear: The trackpad is functioning, but only OSX system gestures are working. So you can interact with the Fusion model, but not in any useful way. Correct?
First we should eliminate your data. Do you find more problems associated with a particular model or workflow?
Next, we should check known troublemakers. We fixed a bug a while ago just like this, it was caused by Autodesk Screencast which somehow got into the "layer" between Fusion UI and the trackpad gestures. Fusion and the trackpad were not hearing each other. I would assume it hasn't regressed, but also that other software may too interrupt that conversation between F360 and the trackpad. Do you have anything running that may be stealing focus from Fusion? The next time it happens, just try shutting any other programs if you can. This would be a great find if it were the case. (imagine trying to test against the myriad of other softwares out there)
Third we could look for Fusion events that may interrupt the trackpad, such as Autosave, or during uploads. For my part I will test on a similar machine for a while using only trackpad, just to try to reproduce it. If we can reproduce it, we can fix it.
Thanks again, and thanks too for your help and patience.
Regards,
Phil Eichmiller
Software Engineer
Quality Assurance
Autodesk, Inc.