I don't have an answer (yet), but I have experienced the same that you are describing. I too am using MTH WiFi. It is only frequent enough to be annoying but does not happen consistently. I suspect that I may have something interfering with the WiFi signal which causes it to drop intermitently (I just discovered this problem with my Lionel LCS WiFi unit tonight). My phone / iPad are usually only 3-4 feet from the DCS WiFi unit, so I don't think signal strength should be a problem. Curious to know if anybody else has the same problem?