Flight Plan Information Disappears from MCDU

[ZDubLee]

Loaded up a flight from Doha to LA, went to bed. Woke up this morning and every waypoint on the MCDU was gone. Flightpath was still visible on the ND, but unable to edit in the MCDU because everything was gone.

[BasileD]

Got that one too 

fixed it by copying active fpl into sec2 and activating sec2 fpl 

[Michel]

Moi je suis incapable de transferer mon plan de vol avec longlet init.

[jaybird]

I saw this as well, I had the FMS on the progress page for a couple hours (not that long) and when i went back to flight plan it was gone this way. No need to copy the plan, see that up arrow symbol at the bottom, I pressed that and it came back in view, no way of knowing if this matches RW behavior or not.