another one is at the gate when you try to access the INIT B page it keeps goind to the FUEL PREDICTION page.even after an FMGC reset it still doesnt acces the proper page.
Experienced this myself the other day with fmgc2. Likewise multiple resets didn't cure the problem. We swapped the navdatabases over to dump all the flightplan data & started from scratch.
If this doesn't work try deleting the secondary flight plan then go through sec-init & rebuild the whole lot in the secondary (inculding the parts in init-B) then activate it.