I’ve never seen anything like this – it goes so quickly it’s rather hard to follow anyway – but it’s certainly true that in certain situations, not least of which is the secondary dynamic, that values put in there are not always reliably updated. This seems more commonly the case when working on several maps at once, then trying to save all the changes. It can also occur that you may make mistakes with individual entries as the field which seems to be selected is not always the one you click on - there are still one or two little bugs to be sorted in this area. Bulk selection of fields is useful but the only way it works reliably is to click the first entry, then hold shift and click again as if to confirm it and then, continuing to hold shift, click the last entry.
If you are finding any behaviour like what I’ve described then it might be a contributory factor but I wouldn’t entirely rule out corruption either – happened to me at least once though the most recent releases of Dorico seem generally more stable than earlier in the v3 series.