Ableton Loop problem with syncing

Hello,

I would like to know if this is a common issue or only a problem of my computer:
- When 'Live' runs with loop active in the arrangement window has some serious problem in sending the timing to M4L devices. Some time when the loop restart, devices that use transport from 'Ableton live', like a M4L sequencer, do not receive the bangs at the metro for a variable amount of time, and obviously stop running.
This happens not only with devices that I created but also with other people patches, like the 'Step Sequencer' or 'ml-px-18' by monolake.

- This problem does not occur when the loop switch is not active and not to all devices all together.

Thanks.