Midi sync problem

Hi

Im running into an issue everytime i feel creative.
Now its a problem with midi sync.

Im using Ableton Live as master clock and send transport/clock to A4 which pass it on to the OT. Im using a ESI8X8 midi interface from the daw.

When i hit start in Live everything works fine for 1 minute or maybe 2 or perhaps 5 minutes, but then it just stops. Someone have a clue what may be causing this?