(Command Block type: Repeated)
(Redstone: Always Active)
I'm Testing out radius @e[r=3] (@e All entities) and use a chicken near the command block. The results are annoying for users who have operator commands enable, all it does is spamming found chicken message until the chicken is out of range. Same goes for all entities.

I'm sure that Java Edition doesn't spam Found [Any Entity] message when Operator commands are enabled.