I was just out adventuring and had something that I suspect is a bug happen.
We were fighting a battle with a crate and Rowdy was on the verge of leveling up from level 2 to level 3. Before the level up the turn order was:
Akina, Gibolock, Rowdy, Slate
Akina and Gibolock went and then Rowdy claimed the box, causing her to level up. The level up boost to her turn order moved her ahead of Gibolock, which ended up giving Gibolock an extra turn. So that round went:
Akina, Gibolock, Rowdy, Gibolock, Slate
I don't mind Gibolock getting an extra turn - she's one of my fiercest fighters - but I thought you might want to know this happened!