Reversed quotation marks

I keep getting a reverse quotation mark at the start of a quotation. I have seen others reporting such a bug in very specific conditions, but I seem to get it all over the place and it’s a real nuisance.

I called Literature and Latte and they confirmed the bug from my screenshot but were baffled.

Anyone got any ideas how to get rid of it?

Here’s a screenshot of just one occurrence.

Surest fix is to key the marks you need, rather than relying on smart quotes… … ion-marks/