Transcription lost (?), unable to download even the corrected segmentation

I don't know if this is a bug or a feature, but here is what happened to two colleagues over the last couple days: they tried a lot of different segmenter, and ended up using it on manuscripts that had some ground truth of segmentation.

It seemed it removed their ability to transcribe (e.line.currentTrans is undefined` in console), and because there was no transcription, the export button would not appear (even so there is segmentation ground truth).

I found a "quick fix hack" that is: simply run a transcription model on ONE of the page at least. Button reappears, everybody is happy.

But I thought it might be a bug ?