Does going to the bench reset Kricketune V's "Exciting Stage" Ability?
No. Even if it leaves play and comes back, you can still only use one Exciting Stage Ability per turn even if you have 2 different Kricketune V in play. It is a Game State check, not an effect.
Source: Battle Styles FAQ; TPCi Rules Team (2021-03-18)

Relevant cards

Note: All applicable cards may not be listed below.
SWSH5_6
SWSH5_6