The Bug:
Endermen holding big dripleaf stems do not drop big dripleaves upon being killed.
In the 21w11a article, it mentioned that upon breaking a big dripleaf stem, a big dripleaf would be dropped, so I'd expect the same behavior for endermen.
Steps to Reproduce:
Summon an enderman who's holding a big dripleaf stem.
/summon minecraft:enderman ~ ~ ~ {Silent:1b,NoAI:1b,Health:1f,carriedBlockState:{Name:"big_dripleaf_stem"}}
Kill the enderman and look closely at the loot it drops upon death.
Take note as to whether or not endermen holding big dripleaf stems drop big dripleaves upon being killed.
Observed Behavior:
Endermen holding big dripleaf stems do not drop big dripleaves upon being killed.
Expected Behavior:
Endermen holding big dripleaf stems would drop big dripleaves upon being killed.
Can confirm