We’ve actually heard a couple reports of GC3 firmware 3.2 causing an apparent bug in the way the panel handles existing interior follower sensor reports.
Typically interior followers (like motion detectors) are ignored during entry and exit delay otherwise arming and leaving or entering and walking to the panel to disarm would cause an alarm. (like what you are seeing)
One of the other users who saw this said this was resolved by troubleshooting. The steps they took were deleting and reprogramming the motion detector zones and power cycling the panel.
I haven’t been able to replicate this issue to confirm which step resolves the issue. I would suggest trying just a power cycle first, then test. Any change?
If not, delete the sensors, reprogram, then after saving the changes wait a minute and power cycle the panel. Does that resolve the issue?