When picking a fight in the arena you might feel like inspecting characters you never seen before... doing that and returning to the VS screen will result in some character cards changing into lower lvl characters... pretty weird. Of course if you start the match you will fight the right ones, but the confusion might make you pick a fight you dind't want.

Not very consistent, but seems to happen to Kael all the time...

Happens on both PC and my android phone, it's clearly not related to my hardware.

Step 1 - Pick a battle

Step 2 - Click on an enemy character to inspect

Step 3 - Look at the legendary character in awe then click the X on the top right to return

Step 4 - Kael is gone, replaced by a lowly lurker apparently. Easier fight? Nope, it's just for show. Kael will still be the enemy you face