Ukes are only human. Even when we are trying not to anticipate or are trying to give an honest attack we can slip into a pattern if we forget to be mindful. In training horses anticipation is something I see a lot of. Once a pattern is established the horse will of course continue to follow it. If you don't want them to anticipate your next request the best way to avoid it is to not establish a pattern. Perhaps the same can be applied to ukes.
Try moving a cat's litter box to a new location and see what happens...
Yes to some degree we do that because in most day to day life, patterns form a useful shorthand to keep us on track with most things so our brain is ready for the non-pattern stuff.
But in training.... not so good! That's when we should be in the moment, NOT on autopilot!