Don’t know if this will help with your situation, but Bombardier just released an Advisory Wire for the Challenger 300/350, reference no: AW300-34-0381, Subject FMS FLT LOG on FMS-6200....”As detailed in the OPSB (Ref. 1.1), upon landing and during the flight, the FLIGHT LOG CDU page should display the data summarizing the flight, appropriate for the condition (I.e. landing info displayed if a landing is performed, Enroute info if in flt). However, there is an issue that the left CDU FLIGHT LOG page may display the flt log data as if it were the opposite flt condition (I.e. Enroute info presented after landing, or landing info if Enroute)
To mitigate issue:
Following a flight, if XFR’d is set on RIGHT on the FCP, use the RIGHT FMS FLIGHT LOG page info, from the right CDU, to record flt info.
The crew may also select the XFR switch LEFT on the FCP which will trigger the LEFT FMS CDU to display the appropriate FLIGHT LOG page info.
Hope this helps
Cheers