I reported the RMS+Peak record metering mode not sticking years ago. Once it was reported fixed, but it wasn't. I re-reported it, and I believe the CWBRN is still open.
EDIT: Well, what d'ya know... CWBRN-3949 reported fixed; must have missed the update.
And I just checked RMS+Peak persistance on buses, and that seems to be working okay, too. This was never a problem that I know of; my CWBRN only referenced Record meters.