The game froze when I broke an Ender Storage chest with an EnderIO pickaxe. The chest was on a ritual altar structure, if that counts for anything.
The game froze and I had to close out of it, and every time it froze right after I broke the chest. It happened 3 times.

crash-2018-12-31_19.19.11-server.txt
crash-2018-12-31_17.03.59-server.txt
crash-2018-12-31_20.22.51-server.txt

I don't know what the issue could be, so here's the mods' versions I mentioned:
"Ender Storage 1.8+" version: 2.4.5.135
AS version 1.10.9
forge 14.23.5.2796
EnderIO 5.0.39

crash-2019-01-01_12.29.16-client.txt

I don't remember what happened, because it was late at night and I left my computer running to see what would happen...