I'm playing the modpack Awakening - Sky of Diamonds. I think this happened because I hibernate my computer at night so I don't have to wait for my client to relaunch in the morning. (I had a long runtime)

I walked away from my computer to get a drink and came back to the following crash.

crash-2020-12-25_19.11.54-client.txt

I tried to enter my save without relaunching my client, after a 3-5 minuet load time (usually takes 10-15 seconds) I got this crash immediately on load of the save.

crash-2020-12-25_19.15.27-client.txt

The first crash was caused by a compacting drawer at (-1017,91,-1003) holding item_ore_ardite.

The second crash (on load) was caused by a compacting drawer at (-1016,91,-1003) holding item_ore_silver.

Edit. After full client restart the world loads and plays fine. (Played for an hour, no issues)

So where there no issues after that initial hour or, there was more issues after that hour? If not then all I can say really is just don't keep minecraft open in Hibernate mode, and if it wasn't open during that time then I personally am lost.