Board Thread:Game Discussion/@comment-29699967-20191106100903/@comment-44175810-20191106194653

It's Apple's IOS clearing out your memory. It's an automated script that clears out non-critical data if your device is getting close to its memory limit. The problem is it isn't very good at managing memory. I have a very old iPad, 15GB with only 8-9GB used. When I download most RR3 assets I use up about 11GB but the IOS decides I'm running out and clears out all the assets about once every two days. Very annoying and there's no way to fix is as far as I know. Extremely frustrating when I travel and have limited access to internet only only very slow/bad wifi connections.

You'll know the IOS is clearing out your data if you see the app icon blink when you first wake the device.