Fraternization

[Tru_in_Blu]

I searched the forum for this topic but didn't come up with much.

Did I read somewhere that umpires should be cautious about fraternizing with team members? Or showing outward signs of partiality?

Recently observed an umpire fist-bumping, low-fiving, and pointing to a player who made a great defensive play. Just for the one team and not the other.

Does USA Softball have any guidelines? I looked in rules book and umpire manual but nothing stood out.