I haven’t done anything special to cause it, just opened the Motion project and left it open (not playing) while working in other apps. At some point I came back to Motion and saw that. I can send my project if that might help?
Thanks! I hope people like it. Re FxFactory, I suspect that perhaps since QC has been deprecated for so long (and buggy before then) it wasn't the safest idea to build products using it. I'll definitely ask about Vuo support when FxPlug4 becomes an option, because I have some ideas. FxFactory do have their own effects platform, though, so it might be possible to do something using that.