Channeled Skills interupting and going on full cooldown

[Mukluk.9082]

When using channeled abilities such as glyph of the stars it periodically interupts a moment after beginning and goes on full cooldown. This happens multiple times per day. Here are 5 clips of it in action:

This is happening enough that some skills are extremely unreliable. I've tried moving some traits around, tried waiting a few seconds after the last auto attack, and many other ideas and I cannot find the cause. I've had other reports from people at the stream of similar behavior from warrior axe 5, such as in this clip: