iOS app crash

I'm trying to fix a crash which occurs in my app a lot. The crash alert shows after killing the app's process (by hitting device's home button twice and swiping up the process) and reopening the app. After closing the Apple's crash popup, the app launches without problems. Sometimes the app crashes in background, even though some time passed since it was closed. Here are the logs I found on the device (I had to replace strings containing company name).

First log, this is related to crash on app start after killing the process:
https://pastebin.com/kuPSAqJY

Second log, this is related to the second, unclear crash:
https://pastebin.com/zcjdLpHq

What may cause these crashes?

 

Same thing for me Do you found any solution there?