January 2023
I was opening a back during all this lagging and crashing in apex and I got lucky enough to get mythic crafting materials but then it crashed me out of the game before the pack was done with its animation and I logged back in and all of its gone so now I can't make an heirloom, please, please, please, give me it back or something because it's almost impossible to ever get mythic materials...
January 2023
The contents of a pack are added to your account upon opening the pack, if the game crashes mid-animation it will not have any effect on you receiving the content.
You could've mistaken the contents of your pack for something else, though I wouldn't be able to see what you've unpacked. (Though someone from EA might be able to pop in here and tell you if you can't find it)