I have the same symptoms with my 2 MP101's connected to a Twonky server running with version 4.4: "a track will stop and then it will start the next track in 5 - 60 seconds."
If I revert back to 4.1, all is well. There have been a number of posts describing similar symptoms, but I haven't seen a solution.
Possibly related: When I'm running with 4.4, I tried to specify that my MP101 client was a "MP101 (RTP)". This resulted in a No File message. So, instead I specified a client type of "MP101", and experienced the occasional playback stop and skip to the next track behavior.
I'd appreciate any advice!