XR no audio notifications after turning off Do Not Disturb
Running 12.3. iPhone is only about 1 month old but in the last week or so (including when running 12.2) when I turn off Do Not Disturb, any messages or calls do not give any sound / ring. Notifications are all on and volume is at half so doesn't appear to be the usual solutions. Restarting *mostly* but not always resolves it. But this seems to happen often but not always. Any ideas or solutions appreciated! Thanks!
iPhone XR, iOS 12