Hm, I can understand how they might get out of sync if I have different concurrent time signatures, but up to this point I don’t have that anywhere where the number of beats in a bar doesn’t add up (i.e. it’s mostly 3/4 against 9/8 or 4/4 against 12/8, with the first bar of the compound time signatures an anacrusis of 6 and 8 quavers respectively, with hidden tuplets and a hidden returning time signature in the following bar). And even if I had missed one or two, surely write mode should match with one of them, and surely the gaps wouldn’t be so large?
For example, in the same file the bar numbers go 235,236,794,795! This is the same in write mode in page view, but shows 237,238 etc. in galley view. N.B. From 794 they’re actually (counterintuitively) correct, as I have a bar number change at the very beginning of the flow. Perhaps galley view always shows the bar numbers from 1 and I haven’t noticed, but either way the page view and engrave mode are definitely wrong…