I'm having this same problem. For some reason, the Holo on the left can't be subbed out. I thought it was my tablet at first but I tried the game on different devices and yeah, it's a bug.
Workaround tip from someone in another post…
Frumpy_geezer4:29 pm
Click the information icon and when it pops up click the character card, when you click back, it should then be selected.
checking back to see how many other new posts pop up about it. Copy-paste…