Interesting little bug - Table is both detected & is not dectected

Question

I understand that Form recognizer Table functionality is in preview, so I suppose I should not be shocked.

I have two CommonDataModel entities added as fields. SalesQuote (fields) and SalesQuoteProduct (as table). I've two collections, and I've been marking many many fields as "unavailable in this document". Over the last few mapping files Form Recogniser did a great job at anticipating the table. I was on my last file, and noticed the table wasnt mapped, that's ok I clicked in. Mapped what fields I could remember, then I skipped back a document to check on the other table field mappings.
And that is when all other files in the collection had dropped the table mappings. The table is being detected in the Form UI but unfortunately the filed list on the right says that no table is detected, bit of a stalemate....

I've saved & closed, reopened. No change. Looks like 2h of mapping is down the drain & I suspect that I need to drop the collection & start again. Sigh... it's a cool tool & my company are excited to trial this. I know it's in preview but damn, why on the last form.....

At the very least can someone upvote my idea to Mark all unused tags "unavailable in document". That will cut out half the time of manually disabling tags.

T