Question about SIM use of Secondary Flight Plan in A320 vs Real World

In the SIM, I have a flight plan in the MCDU destination CYVR. in the SECONDARY fp, i have the same departure and similar route, but with destination 200 miles closer.
I start my flight using the normal fp to CYVR. During Cruise, i open the CRZ performance tab on the Captains MCDU…. and on First Officer’s MCDU, I open the CRZ tab of the SECONDARY flight plan. As expected, the estimated fuel-at-destination is shown greater on the secondary (presumably because of the closer destination).

But the time for top-of-descent and TIME-at-destination are identical on both…indicating that the secondary flight plan is displaying information for the actual flight in progress, and not for its own flight plan (except for the estimated fuel-at-destination).

Is that real-world, or is this a bug with Fenix???

Moved to User Support Hub for community assistance.