Sorry for the late reply.
I played again today. Still no Orange spawned (not at game start but after game started when tiles got destroyed and refilled, in case I was not specific enough).
I also don't think I killed myself with Orange tiles because that was one of the few games I cleared all Orange tiles very early. I have always been meticulous not to choose any power-ups that randomizes tiles, but I think I did have the randomize power-up colours perk.
Yes, I did try to watch the death replay, but it was so small I could not make out what powers I used before I died. I suggest, in addition to a larger replay screen, a textual log of what happened; the skill names above the character overlap and can be rather difficult to read.
But of course the queuing bug is the first priority. May my feedback be helpful at all :).