I used to have no issue with this, just like the person from this reddit post, where my music app would resume playing if it was the last app with media playing via Bluetooth and I did not actively close the app since the last time it played.
I am having this same issue, with this same phone, running (I assume) the same Android version. Ever since I got my Pixel 7, I've had no problems with Bluetooth resuming in my car. I'd listen to Deezer on my way to work, my way from work, and as long as it was the app of choice, it would start playback as soon as it connected back to my car. I received a few updates recently and now that doesn't happen. Now it just shows me what it was playing, but never starts it, and I have to go into the app, itself, just to "wake it up" to play.
Anyone seen similar? I've unchecked all things that I know of which could stop an app from running in the background, or with loss of connection to devices. It's not set to close at all for any reason, yet it almost seems like it does. No one has responded to the OP of the cross-post so I figured I'd extend this post to Lemmy and see if anyone has an answer or suggestion.
Soon as my phone is paid off I'm going to Graphene or some other alternative to Google's trash.
Get rid of Ronald Reagan.