Do you have "Sync playback to display" enabled?
Yes I did ... might have been on by default ?
I moved back to my Atom+ION2 ... and finally updated to LE ... (was still on OpenELEC ... didn't realized its fate ) ... and had the same problem. Just had googled this for Kodi in general ... http://forum.kodi.tv/showthread.php?tid=292983&pid=2492915#pid2492915 - and this resolved my Atom+ION2 issue. I'll go back to the ARM later ... but suspect this was the issue.
Would have been the last thing to think of.