I can't load my 3rd slot

So, when I try to load my 3rd slot, this happens:

(sorry, the video is 480p)

The button is now “.” and it’s stuck on that. I can’t click “load” or “select” for the other slots.
I rejoined, like 20 times, and I tried to load my 3rd slot but, I was unsuccessful.
I haven’t heard this happening to anybody, so it might be only me who’s experiencing this.

Update: I joined again and it works!

Anything in the log?

Nope, nothing related to the slots.