New Bluetooth speaker connection issue: hear alexa, not program

[mander5161]

have 3 echos in apt connected through in apartment wired speakers.  works great, can change and update from any room.  i have a waterproof bluetooth speaker in the shower as the wired speaker doesn't really reach in there.  i've connected the bluetooth speaker to the dot in the bathroom.  all is fine, i tell echo to "play radio station xxxx", the bluetooth then comes on with Alexa confirming the command "Now playing radio station xxxx" and the rest of the wired speakers play the new station, but the wireless is silent.  i can change to another function and the other speakers will play the new station, but the shower only plays what alexa says.  SOMETIMES it does work.  it's not related to the service as sometimes it WILL play the radio station or podcast that previously was prevented.  any ideas?

thanks

Mark
Chicago