Old and Bold RC PILOT
I thought something must be wrong so I checked and rechecked it and then relaunched it. Once more I climbed to height and looped into inverted flight. I once again waited and waited for it to self right but again it didn't. If anything it would self right to the inverted position. Again I was puzzling over the issue when again the ground approached. A second inverted landing ensued without damage.
I have NEVER repeated the experience as I still do not understand what was happening unless it had something to do with the wing incidence angles.