Multiple PvP requests

[MrFire]

After getting PvP requests from 2 people, I got "[name 1] offers to duel you" as usual, followed by "[name 2] invites you". Clicking the second gave a blank screen.

[serprex]

I think the 2nd is someone trying Custom which is pretty broken & all the netcode for that was removed so this shouldn't be able to happen anymore