Gpodder Sync

The problem isn’t with Nextcloud (I had the same issue happen with me). The problem is with the default sync settings on Thunderbird and DAVx5 (at least for me). Thunderbird defaulted to a longer than I wanted synch schedule, so I dropped it down to syncing every 15 minutes. DAVx5 was set to 240 minutes unless the event was created on my phone. Once I updated both schedules to every 15 minutes, I haven’t noticed an issue.

You can change to developer options and unknown sources on your phone before you get to your car. I have noticed updates occasionally lead to Android Auto not making Antenna Pod available. I’ve found that turning off unknown sources and then turning it back on will fix it.

I use Antenna Pod from F-droid on Android Auto. You have to turn on developer options (inside Android Auto on your phone) and select Unkown Sources for it to work.