Did you happen to attach your hoist rope to your string directly?

It's rare but I have heard of people pulling the string partially off the cam track pulling a bow up by the string......I imagine a gound wheel type bow like your Team Fitzgerald would be even easier to dislodge a bit.
Or you got something wedged in the system.
I would also have the shop guy make sure your string is tracking true at rest and full draw.

Then when you get in your stand you draw back a couple times on weird angles checking clearance and probably with gloves, headnet etc on you put more otrque on your grip and riser and can actually just pull the string off sideways.

Maybe a combo of the 2?