The app work fine before iOS 11 update. After iOS 11 rollout, some user get this below crash but I cannot reproduce this in simulator iOS 11. Based on fabric.io, not all iOS
Not a complete solution but if it's trying to remove an object at index 9223372036854775807, it's worth pointing out that isn't a random number its the maximum value a 64 bit integer can hold
So somewhere maybe it's caught in a loop, or something along those lines. If you haven't already, upload your .dysm file to Fabric and it will give you more informative crash reports (even from the reports you already have) with function names, variables etc so you can pinpoint it to code more accurately