Hello,

Not easy to explain the issue but here is best try: in the planned route I am passing two times at the same point (entry and exit point for the EBBR exception to go to/from EBGB).
In flight, the plog gets confused by this. He suddenly jumps to the other leg going to the same waypoint (which is in fact the end of the flight when I am at the beginning).
This can bee briefly seen as well in simulation (while in flight the issue started sooner and took longer to get back no normal).
Attached the planned route.
Might be useful to include a "situational" awareness logic in the plog (if I am coming from WP A on leg AB, next leg is BC at turning point and not leg XB of BY which are further in the plog).

Issue was in flight mode on SD on iPad

Hope this makes sense. Attached the fpl which will allow to better understand I hope.
If unclear, do not hesitate to contact me.

Br,
Jf 

Another option is not to use exactly the same point in both directions but to use a nearby point, for example a user waypoint a tenth of a mile away