Character's Boxing Ring Portrait Disappearing After Checking Move List

[TayNot]

As the title suggests, I ran into this issue when playing a match today on the boxing ring stage.

After I checked the move list for the character I'm using, their portrait just disappears on the screen that appears on the stage.
I noticed this only happens on vanilla/default slots only, cause when I tried it with a costume alt, the issue didn't occur.

I tried narrowing down to what was causing this issue, which eventually led me to just using ARCropolis, and the issue still occured.
I have no idea if it's because of Smash updating or the latest update for Arc. Also surprised no one mentioned about this issue until now.