Hi @Vpwdoc
Welcome to the Sonos Community!
Sorry to hear of this issue you have been having with Alexa and Apple Music on your Sonos system.
I just now tried to recreate the issue, but could not - “classic rock” played the next track without issue.
However, as there is no Queue button showing in Now Playing when initiating playback with Alexa, it does seem that it is Alexa not providing the next song, as opposed to the speaker not doing it (the speaker has not been told what the next track is, otherwise there would be a queue), so I suspect this may be rather easy to fix:
Please open the Alexa app and go to More » Skills & Games » Your Skills » Sonos » Disable, then Enable to Use.
I hope this helps.