DF aka Demon Fury is the Resource Bar for Demon Slayers
Chaos Lock has a high chance of disconnecting the player to world select if used when DF is low https://streamable.com/b15dl
additional notes: crashes occurred when cast with 25, 31, (16DF + returning DF)
Extra DF cost to cast skill
The skill consumes DF twice(once when casting and again when it hits the mob) ,this second consumption my be the cause of DC(not confirmed)
Steps to reproduce:
1. Use Chaos Lock, can be observed that Skill cost is higher than the 20 DF cost in the description.
2. Lower your DF bar.
3. Cast Chaos Lock when DF is near empty.
4. Crash to world select.
Character name: SoloParty
Yeah boss flame drop rates are definitely much lower, powerful flames were common drop and rebirth flames were rare now, powerful flames are rare and rebirth flames are a myth.
I almost all daily bosses on 3 characters with drop gear and spider
Only exception is madman ranmaru who still has "familiar" drop rate to before patch. The current situation feels very familiar to flame drop rates when they were first released. They increased drop rates to a reasonable level for a long time but now it seems like were back to square one. If such changes are to be made they should at least be transparent about it. I really hope its just and accident/ oversight on their part that once made aware they will fix it.