The bug
Large magma cubes no longer drop magma cream when killed.
How to reproduce
Spawn several magma cubes of size medium or large
Kill them
Expected result
They should drop magma cream 25% of the time
Observed result
They never do
Cause
Same as MC-307315, magma cubes no longer derive from Slime, but SlimePredicate checks instanceof Slime. This predicate is used in the magma cube loot table, so it always fails now.
Maybe our luck is just like really bad (joke). Its also not dropping for me .