For example: note lengths are reported incorrectly when track signature R is different from default TS R. I’m not aware of any workaround for this (except perhaps not using different signatures).
There are also many other bugs regarding note lengths, for example under some circumstances the length of an existing note can’t be increased beyond a certain limit, one workaround could be deleting the note and entering a new one with the desired length.
I also reported a bug that resets the CC LFO waveform with certain combinations of time signature and LFO speed. A workaround might be not using those combinations of TS and LFO speed.
There is also a very basic sequencing function still missing described here: Pyramid make a sequence be half speed or double speed? I don’t know any workaround apart from reworking the whole track manually or editing the midi file on the SD card in a computer