When I try to Modify a paragraph style, when I click Apply the changes are not reflected in the document, or for that matter, in the Style’s property sheet. In previous version, a few changes would be shown, then the changes would stop being shown. Now, with LO 126.96.36.199 on Linux (deb x64), no changes are shown at all.
Are you using ODF or MSO files?
Maybe you have direct format applied. Try selecting a paragraph, right-click - Clear direct formatting.
Thanks, but that is not the case. And it wouldn’t explain the changes not showing in the Style properties viewer.