I’m on an Android using version 1.11.3 build 605. Everytime I try to do a 10x epic hero summon the app crashes at the start of the animation. It doesn’t affect my gems though.
You should contact support…
https://smallgiant.zendesk.com/hc/en-us/articles/360000542934-How-to-Contact-Support-v1-9-7-onwards-
Someone mentioned elsewhere that they had this problem only until they used all their saved epic tokens.
Dunno if that is happening to you, but worth a mention.