Guild Wars 2

If an engineer breaks a pinata with a kit equipped, the kit is then unequiped and the player is kicked back to his main weapon.

That should be a given considering (despite the fact that the skill bar doesn’t change) you use a unique “weapon” to bash the piñata with. It shouldn’t be a big deal since there aren’t any imposing cd’s for weapon kits really. (I use grenades on my engi and when it gets unequipped, I can easily re-equip without much effort) And, you’re in a city with no immediate danger. So, this seems to be as intended.