Like the title says, if you cancel a queued up order in the microbe musher, the machine will do the spitting animation and stop wobbling around while the progress of the mush bar does not get affected, the mush bar also still slowly falls from the machine.
Basically it kinda looks like the dupe is just staring at the mush bar drooling and waiting for it to come out instead of operating the machine.
1. Queue up a few orders in the microbe machine 2. Cancel any order EXCEPT the 1st one(left most) while a dupe is operating on it