Hi, please anyone else may check if what said in title is happening.
Example: start the sim session having the C152 selected last time you closed it, switch to the A320 and check whether Max fuel displayed in the W&B window is 46900 LB (correct) or 42000 LB (wrong).
In case it’s wrong, reset the plan (F12), exit to the Main menu, re-enter the Map mode and check that the fuel display is now correct (46900 LB).
Thanks