Notification Media Bar Play Stores Not Work After Inactivity

You say Android 14 then later 5.X. Since you have a Pixel 7 I’m assuming your actual Android version is 14?

Anway, this issue has been reported in previous posts (this specific post is about widget behavior but as noted in the replies for it, further testing has verified it also happens with the media player notification)…

It is not yet resolved.