Hawezar can be a pain in the butt.
with 48/49 you are def missing a kill drop quest. For me it was the Curious Venom quest. Took forever.
This is a great list of the hidden Hawezar quests. Hidden Hawezar Quests
You missed one, and unfortunately will need to spend some time doing each of them until you finally get the right one.
Nothing is bugged, some drops are just a huge time sink.