Bug Description

https://pastebin.com/4XpEJvxc - crash report 1
https://pastebin.com/bUe1M7hd - crash report 2
Those 2 crashes(watch below) happened with interval of 14 minutes, I don't remember any other crushes eventhough I've been playing in this world 40+hrs so I think they're bound somehow. The only major thing that could rise those fatal errors is /gamemode 1 as I can think

Did this behavior use to work in the previous version?

I haven't played any other versions

Steps to Reproduce (for bugs)

I don't know at all, may be some form of cheating (/gamemode 1)

Logs

• Client/Server Log: I don't know what is this
• Crash Log: https://pastebin.com/4XpEJvxc - crash report 1
  https://pastebin.com/bUe1M7hd - crash report 2

Client Information

• Modpack Version: the latest SB one
• Java Version: 1.8.0_271
• Launcher Used: CurseForge
• Memory Allocated: 8Gb
• Server/LAN/Single Player: SP
• Optifine Installed: 0
• Shaders Enabled: 0

World Information

• Modpack Version world created in: the latest SB one
• Additional Content Installed: 0