I mentioned this before but got no answer.
Since the last TS update, selecting a preset group takes an absolute age (several minutes, enough to make a coffee) before it appears in the left-hand panel. Something got broke, that’s for sure.
Mac Mojave OS.
Did you log a support request as I believe there are issues with the Mac version?
Don’t remember if I did or not, to be honest, Don. I’ll do it now.