Thanks for posting and for being a step ahead of us.
I know how it feels when something isn’t working as it should, let’s get this resolved. A few things: dId you try streaming other radio station to isolate the issue? Could you provide your Nest Mini's firmware version?
Try to use the command 'Listen" to play your radio and see if this will make a difference.
Keep me posted.
Due to inactivity, I'll go ahead and lock this thread in 24 hours. Feel free to start a new thread if you need assistance with your Google speakers and we'd be glad to assist you further.