It is possible that a project can become corrupted. It’s rare, but it can happen once in a while.
I had a project, where the OT kept sending midi out on a channel, which was not even activated to do so (as per settings shown in the display). It was frustrating. It took me some time to find out, what the heck made this one external instrument do anything at all, but I couldn’t change the settings to stop it. Creating a new clean project and starting over did it finally.
My experience is that, if the OT acts really strange and weird and even the manual tells us that we should have done everything right, the reason might be a corrupted project. I believe, my issue was generated by switching the OT off without having saved my project manually before and the automatic saving hadn’t got everything right. Now I save tracks, patterns, projects manually from time to time and (knock on wood) since then didn’t run in such problems again