The MI-28NM can only launch the first round of missiles

The Mi-28NM can only fire the first round of LMUR. I have encountered this situation for a long time and have ruled out any button issues. I found that in the Land Combat Historical Mode, my helicopter can only fire the first round of missiles, and missiles after landing for resupply cannot lock on. What exactly is going on? Can someone reply to me?
PS: This article was edited using a language translator, so there may be expression errors.