So I've been exploring Act 8. And I realised that there is a champion selector issue. For people who are unaware, we can change 1 champion right before fighting main bosses. I have a screen-recording, but that format isn't allowed to be posted in here. So, I'll run it to the community with a series of screenshots.
Note that these screenshots are from 8.2.5 story mode.
1. I access the "swap champion" and change my Ironman(infamous) to Yondu.

2. I press "Swap".

3. Not only did the champion NOT SWAP, but Yondu completely disappears from my roster.

4. This is when I think that the game is bugged and try to swap my Ironman(infamous) to Blackcat instead.

5. I press Swap

6. It shows that my champion is swapped so I press "save"

7. And boom! Plot twist, I swapped my Ironman(infamous) for Yondu and not Blackcat like I initially wanted to.

This whole thing is very sus. I've also experienced this 5 times when exploring Bahamet quest (8.2.6). And I believe I'll continue to experience this throughout my 8.2 exploration, maybe even 8.1 exploration. This needs to be fixed. Thank you.