Skynard man.... I've been watching Alpha's fly for awhile ...one thing that I would check is the red stripe (starburst) type thing on the top of the wing...in the last month I've seen the red covering lift on the top side of the leading edge...once it just lifted from the base clean through to the tip of the wing..had to land and rip it off....the other time it lifted only in the middle...causing that wing to stop generating lift ..then into the death spiral...check your alphas..
good luck
John