Plex not playing music on first generation Echo devices

Thank you for the response saying it’s on the to do list. I want to reiterate as in the text below that the Alexa skill is not working when running two as stereo plus echo sub 2nd gen devices, not just 1st gen. Works fine on 1 echo dot 2nd gen, but not at all on 2 stereo 2nd gen echos w/echo sub. (See below) …
Wanted to enjoy my Plex library on my Gen 2 stereo echo devices and echo sub for Thanksgiving. That sure would give me something to be thankful for. But, alas… as before… no joy.
Still not working. Alexa says “Playing Library Radio.” Stream never starts or shows up on PLEX dashboard as now playing on the two Gen 2 Echo devices running stereo with Echo Sub. Plays fine and shows up as now playing on one Gen 2 Echo Dot (both .mp3’s and flac files play fine). Wish someone would look into this SOMEDAY SOON. (Thanks again for letting us know it’s on the to do list. I am just trying to be a squeaky wheel and get some grease here)…