Strange MIDI behavior

An odd question: has anyone ever had their MIDI tracks’ note data suddenly shift? When I restored a pattern last night with [FUNC] + [NO] after doing a [TRK] + ALL filter sweep or some such mangling, my external synth sequences were suddenly fubared, shifted by 4 semi-tones down.

The notes on the trigs were all correct, and all of the DT tracks were unaffected. It was driving me crazy. I even loaded other projects and the problem persisted there. I started to worry, but then managed to reset things by turning my other synths off and on again (I had tried turning the DT off and on again first, but that didn’t work).

I couldn’t find any other topics with this problem…was curious if this has ever affected anyone else or is a known bug?