i had this the same issue as well as you do. this is actually my first freaking time. IT happened since 3pm and it worked for short time until the issue occur again and lost 2 gauntlets.
I am having the same issue andI have the fastest internet you cam get…it works on iphone 14, but not on ipad….
it appears many of us are having this problem…it seems it is being worked on, was able to play a game in the Arena, won, and then received the network data problem screen…and did not get credits for the win…game has been buggy since the last update…have patience, I guess…
