(this was posted as part of a report in another thread but has been separated to be able to focus on the issue individually)
On my Mac 10.11.6 with PM6+ beta, the Open Recent menu flyout shows up emty (only clear menu item is shown). Only after selecting the menu a second time does it hold the expected content.
This does not happen on my 10.14.4 machine, nor does it happen with plain PM6.