If you're talking about a VR-type simulation where observable reality is simulated, but our consciousness resides in a 'higher' level, then yes, something like what you describe could be an example of falsifiable evidence of simulated reality.

But in the case where we, ourselves reside entirely within a simulation (or whatever) then we're tied, lock-step, with the universe's time, and any jitters or pauses (even outright simulation termination) would be completely unobservable to observers within: the ants in SimAnt don't recognise when I pause the process in Task Manager.