No audio in GarageBand on iOS18

Ever since I updated to iOS18, I have been getting no audio from the GarageBand app when playing back songs. I can export just fine, but other than that, the app is silent no matter what I do.

Strangely, it works just fine when connected to CarPlay.

I’ve tried:

-Restarting

-Disabling CarPlay

-Uninstalling and reinstalling GarageBand

-Updating to iOS18

Nothing has worked. What do I do?