This happened to me the other day on my Maxisys Mini.
I was streaming music through bluetooth to my bluetooth headset and then connected the VCI to a vehicle. I tried to disconnect the bluetooth headset in bluetooth settings and connected the VCI through bluetooth. Then all of the MFRs were gone. I think it was trying to stream music AND connect to the VCI at the same time and something went wrong.
I had to go to the update section and re-download every single one of the manufacturers. Everything working fine since that.
I realize the tool is more for diag than streaming music and this scenario probably was not tested. I did not try to duplicate that situation to see if it happened again. Since then, I have just been turning off my headset before connecting the VCI.