Not entirely sure what you mean by "go only main release channel", but the latest release kernel will typically be used by master. LE7 will remain on 4.4.x, once we branch for Beta we can see about bumping master to 4.5.
Logs here please. Did the problem only start with #0412?
Ok. Latest release was what I meant I will post logs here then. Yes, only started with #0412. Downgraded to #0411 and all good again. GF using the box now so can't upgrade and get logs now.