iPhone 7 Plus: Ringer volume buttons not working

I can no longer adjust the ringer volume using the buttons on the left side. The buttons now only control the system volume (like Siri’s volume, etc.)

The “Change with Buttons” setting is on. I’ve turned it on and off a number of times. Restarted my phone and turned it off and on. Still no luck. Could this be related to the most recent iOS 14 update? It worked fine before.

It’s inconvenient to have to go into Settings each time I want to adjust the ringer volume. Any ideas or suggestions appreciated. Thanks!