Very Bizarre issue with WF-1000MX5, need help.

I'm having a very strange issue with my pair of WF-1000XM5 earbuds. They connect to the app without any problems—I can switch between noise cancellation and ambient sound modes, and those work properly. However, when I try to play any audio from my phone, the phone shows that it's playing through the earbuds, but no sound actually comes out.

I've tried placing the earbuds back in the case and taking them out again, but the issue persists. Interestingly, the earbuds do play sound when I switch listening modes or press the buttons to change tracks or adjust the volume. The only thing that fixes it is restarting my phone—after that, the earbuds work fine again... but only for a little while. After a couple of uses, the problem comes back.

I've also successfully replicated the issue on another phone, so I'm pretty sure the problem is with the earbuds themselves. Has anyone else experienced this?