Cue Tracks dont always trigger when exported

In Ardour8.12 and Mixbus11, I have had several different projects that , if using cue tracks, when exported , the cue track is not played, or a delayed start on the export. If I re-export the project, everything works as it should.

I cannot seem to find a way to reproduce this, but it is generally when a new project is created, some cues added. Usually it is MIDI drum loops that I am putting on the Cue track. Playback and stop in random positions in timeline, fidget with some track levels, then export, I may get an export without a specific Cue Track. It seems to generally be the first export of the project.

Anybody Else ?