@songman there are several issues with recurring dates in the latest release, but good news: there is a pull request with a bunch of fixes in it!
Hopefully, if all goes well, these fixes should be in the next MM release.
In the meantime, I’d be happy to see if the fixes resolve the issues that you’re seeing. If you could DM me the .ics file (feel free to delete location data and/or event names) and specify which events aren’t properly showing then I can take a look.