Grand Arena Championship Crash and Sign up Issues

ally code 144-941-758

iphone 8

ios 12.3.1

joined this championship on launch - 9 July?

issue - game crashes when I tried to  launch a battle against  a squad during first attack phase - 11 July? -  needed to restart and when I did enemy squad showed a battle and my squad had disappeared - cost me another couple of battles to complete as my stronger squad had blinked out.  I did win the round but by significantly fewer points and also lost the first time bonus to count towards feat