I don't know if anyone else has experienced this, but now and again (not all the time) my fades in and out glitch at the outer end: before a fade in, the image or video appears momentarily (probably just for one frame) then disappears, and the fade starts normally. Similarly at the end, with the final frame flashing up full brightness.
It also seems to some extent to happen on audio - it's like OpenShot realises a moment too late that it's not meant to be playing the audio, or that a fade is meant to be happening.
Sometimes it doesn't happen, and sometimes it fixes itself... unfortunately not on a 'quick' project I've been doing this morning!
Anyway. It's absolutely great work - I'm so impressed! Something as good as this, and non-linear (I can't understand what you can even do with linear editing!) is a joy to have!
Again - great application. I've already done some stuff I'm really pleased with!