PENDING TRACK, I will upload one in a few hours.
Way to reproduce.
1-Take a TGP
2-Make Several Markpoints
3-Go to Markpoint 1, hit WPDDSG
4-Increment Markpoint to MK 2, hit WPDDSG
5-Increment again and hit WPDDSG
After some iterations (Within existing markpoints), the TGP will be stuck and it will not be possible to slave the sensor to the markpoint (also applies to waypoints).
EDIT: Sorry for the title typo, i meant does now *work*