I've tried including Matukio events using both the AcyMailing tag as well as just inserting a mod_matukio_upcoming module directly into the acymailing newsletter.

All my individual (one-off) events show up without a problem; however, none of my recurring events show.
They do show in the module within Joomla itself, just not whenever they are included in an acymailing newsletter using the acymailing->matukio integration

Any ideas where the problem might be?

[NOTE: You ask if I searched the tickets ... that's a bit hard without any search function on the ticket page. I did however, scan the first 20 pages of tickets and didn't find anything related to AcyMailing.]

Also, I searched the forum and I also posted this there without any response.