Bug Flight plan during a flight

Hi guys i have a problem. During the flight my flight plans are erased and the AP is lost. On any aircraft I have this bug, it’s heavy. An idea? I am obliged in flight to redo a flight plan. HELP please

This is a problem! Any idea how your flight plans are getting erased? It is possible to reload your flight plan during a flight. Pause the flight and from the Pause Menu, selsect “Load”. A window will open that limits the files to .flt flight files. Type in . for the file name and press enter. The window list will open with all files. Select the flight plan (.pln) to load. Then press enter to have it reloaded.

I found the problem, it is that I deactivated and that I reactivated the VR … Thank you for your answer