Sudden Issue With Playback on One Session

[Snafu]

Hi guys!


Been working on this track for a good two months and getting very close (famous last words!)...all of a sudden pressing play takes the session to an imaginary bar -1978 and its impossible to get it to play on the actual session. Changing session start time does't help anything, nor changing the link timeline and edit/track and edit.

1.Does anyone have any ideas? Never seen a weird bug like this before if it is a bug. I wasn't really pressing any strange keys or anything when it happened.
2. If not, is the easiest way to hopefully fix this to copy each track/session data on a new session via the import track command?

My other sessions play back fine.

Thanks as always!