Using LibreOffice 18.104.22.168 I’m finding that whilst LibreOffice now starts up quicker than ever before, with every successive release the formatting dialogs seem to get slower to load each time. By dialogs, I’m referring to, for example in Writer,
Format → Character
Format → Paragraph
Tools → Options
Styles → Modify
in Calc the Cell Format dialog is also very slow and others are slow. And even after the dialog has opened (takes 10-30 seconds) when I click a new tab there’s another delay before the contents of the other tab within the dialog appears.
The computer is now quite old but it has plenty of memory available and no other program runs this slowly.