Magic Kingdom rope drop

I’ve noticed on my TP that the MK Welcome show is at 8:40 for 5 minutes (MK opens at 9), then my next item, Space Mountain is listed at 8:55.

Does anyone know if that’s just a glitch or should I expect that a 9am opening is more official than actual? I’ve heard MK sometimes does early RD. Is there any rhyme or reason to it and if so, how much earlier?

Not sure if there is any rhyme or reason, but I believe that even if they drop the ropes a little early many rides will still not begin operating until official opening?