Hi Rick,
How very strange!
Here's the relevant TGS log section...
23/01/22 10:04:42:250 - Initialising TP's.... Trig: 150 WP: 2 of 26 Hdg: 15 TP Dir: 15 TP Dist: 177 metres
23/01/22 10:04:42:250 - TGS_Visual: True
23/01/22 10:04:42:260 - Initialising complete!
23/01/22 10:04:51:400 - PF3 is no longer running!
23/01/22 10:04:51:400 - FS Screen : You've reached the holding point! TGS Deactivated!
23/01/22 10:04:51:400 - You've reached the holding point! TGS Deactivated!
23/01/22 10:04:51:410 - Exiting TGS...
As you can see it thought PF3 had stopped!
I will investigate further but TGS will stop if it detects PF3 is no longer alive.