Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
e461dcfe #555: Item - add getters/setters for owner/thrower
CraftBukkit Changes:
055870c4 #758: Item - add getters/setters for owner/thrower
Fixes twisted vines not connecting properly when grown via
bonemeal by a player.
In general, look at making this logic more robust (i.e properly handling
cases where a captured entry is overriden) - but for now this will do.