I'm not sure exactly when this started, I've been dealing with it for a while until I had time to troubleshoot it. I'm pretty sure it was present in 1.27 Final, definitely in 1.28 pre-release. It appears to me from the logs that the TV server takes a little longer to establish the connection...
We have just released MediaPortal 1.28 Summer Breeze
Highlights of this release
[MP1-5053] - TV framerate is not parsed from tsbuffer
[MP1-5058] - Infinity waiting in TVClient library
[MP1-5059] - Performance stats displayed incorrectly
[MP1-5061] - SQLite does not select all data...