Villager Bug While Gathering From Deer

I just played a game and experienced a bug. I used 9 villagers to build a mill on a deer pack and did not queue any further commands. When the mill was built there was a nearby neutral sheep that was captured, and by default the villagers killed and then gathered the neutral sheep. After the sheep was depleted, the villagers went idle as opposed to gathering the deer - but the catch is that there was no idle villager notification. All 9 villagers remained idle for 7 minutes before I noticed. I have a video recorded on my PC, but I cannot upload it as a new user.