Is the weight of the bow 39# at your 25.5 draw length, or at 28 inches? What spine are your current arrows? What's your brace height?
A brace height that's too low can cause the arrow to kick off of the riser shefl-sideplate, but that is usually seen as a flip to the left. You may not be seeing the initial flip. If it flips one way, it has to flip back the other way to straighten itself.
A spine that's too stiff can also bounce off the side plate, but again, the initial flip seen is likely to be to the left. A flip to the right would suggest a spine that's too weak. The shaft is actually flexing around the riser too soon and correcting as it passes the riser.
Given the stats you provided, assuming 39#@25.5 inches, and also assuming it's a high performance bow that has a low stretch string, and, of course, cut 1/8-inch past center, woodies in the 45-50# range should work. Of course, this only speaks to the potential mechanical problem. Bad form could be causing it just as easily.