Been meaning to ask the same question since, maybe September. Only began recently using Mezzmo Android on my Sony TV. I keep seeing updates and keep installing them. But playing all videos in a folder simply does not work. I'm using the internal player, the option to queue all in the playlist is selected, and when I play a video, I can see the message at the bottom that videos are queued. When the video ends however, nothing happens. It's as if the queue all option is not enabled. About a month or two back, the behavior was slightly different in that it would try to play the next video but the spinning wheel was just there forever until I turned the TV off.

Two entries in the device list for this TV. One is the TV itself - matched by MAC ID - and I just changed the profile from Sony Bravia (detected by Mezzmo) to Conceiva Mezzmo (Android). Next there's this Mezzmo (Android Bravia 4K) device with the Conceiva Mezzmo (Android) profile and an IP address of 0.0.0.0. Not sure what that is. But if I disable that, videos stop playing.