Hi Nik. I have a small index project with one gallery type page.
With 6.3.4 I make a minor change (add a character to some text) and publish, three or four files get published.
With 6.3.5, I make a minor change and 71 files are published
I Re-publish all files and 453 files get republished. I save, make a minor change and 71 files get published.
I open the project in 6.3.4, make the minor change, three files are republished
I’ll try to email the project this afternoon.
BTW I have a large blog project that is worse, but a couple other small index type projects that seem to be OK. It may not be that every page/project has issues.