Rune regeneration glitchFollow

I am having a problem on my DK with a rune regeneration glitch that happens at the same point in my rotation.

It happens every time I am re-applying diseases and it also happens in the first rune cycle, so that is what I will reference.

My DK is only level 60, levelling as 2h Frost. Here's how I open a fight right now:

IT > PS > Oblit > Oblit > FS.

What happens is, when that 2nd Oblit uses both of my death runes, only 1 of them starts regenerating. The other one doesn't start regenerating for approximately 7 seconds. I don't know if something is triggering it to start regenerating or what, but it always seems to be about 7 seconds.

I used to have this problem back in the day when we had to BS/BS to turn our blood runes into death runes and then use them for an extra Oblit in the 2nd half of the rune cycle.

Anybody else seen this?