GITE4R has indeed no constraint at ROBEG, but the ROBE09 RNAV transition has. Did you accidentally select this transition or was it automatically selected? Iirc, the CRJ sometimes preselects transitions for approach.
The selected transition may also explain the strange distance value, because itcontains a vector segment, which may have confused the FMS. It has already been reported that there are some issues with vector segments. However, it obviously shouldn't display those large distances and this doesn't explain why it happened suddenly.
LGAV/21L KOR1F KOR UL53 GARTA UV60 YNN UL604 DIMIS DCT RETRA DCT
PERAN DCT IRDIV DCT PETOV DCT LAMSI DCT LASGA M726 LASTO M852 BIRKA
T803 GITEX GITEX4R EDDV/09L
ROBEG (IAF) has no constraint. Next DESIM, 3000ft is required to catch the ILS into 9L EDDV.
Wenn i initially checked the FPL (SID,STAR,APP), all was okay. It happened inflight, magically, the FMC shows still 577NM away from DEST.