In my modpack, when taking a bucket of lava from creative JEI menu with a backpack from Sophisticated Backpacks, the game crashes.
After disabling the quark addon, lava bucket trash, the game no longer crashes when taking a lava bucket from JEI while using a backpack from Sophisticated Backpacks.

crash-2021-05-30_08.50.22-client.txt
crash-2021-05-30_09.56.32-client.txt

Update quark to the latest and this should be fixed