Chests are acting up, im way too inexperienced to explain the issue but it causes the server to hang on shutdown or the client on world exit

thread where I talk to someone slightly more knowledgeable:
https://forums.minecraftforge.net/topic/118665-game-savingexit-process-hangs/

thread dump:
https://gist.github.com/RitzScythe/be5639bb3a31659145fbd2c94c13755c

from thread dump, and the description point of view it seems to be related/same as #69

• net.joefoxe.hexerei.tileentity.ModChestBlockEntity.sync() @bci=54, line=157 (Interpreted frame)
• net.joefoxe.hexerei.tileentity.ModChestBlockEntity.onChunkUnloaded() @bci=1, line=151 (Interpreted frame)

I think this is related to the issue I was coming here to post. I noticed eventually my server CPU usage creeps up. Spark shows the thread usage per mod. OnChunkUnloaded() is taking up quite a lot of time from hexerei tile entity.