Automate music on multiple echos through Echo Speaks and Rule Engine

For people who ran into issues when mixing the music play commands to MRM groups and individual device, for example sending search music command for individual device, but music played through MRM groups after a few mixed commands sent, there seems to be an issue in Alexa MRM groups itself
and not the integration. This can be observed in the native Alexa app as well. See below for details.