Sudden Drop in Fuel Pressure and Power Loss on 912is

thanks for all the amazingly guidance as I’ve been losing sleep over this mystery. 

as Roger mentioned, this issue has only happened when I’m descending and when I have aux fuel pump on.  I can’t replicate on the ground and have never had issue is climb or level flight and I also did 10 flights before it happened again yesterday

once I find a mechanic that will come to Sedona I will check fuel filters, fuel pumps and have them check all the electrical connections.  Not sure I will be able to a Rotax specialist up here.