Blank chat message generates when killing any mythicmob

Summary

When killing any mobs spawned by mythicmobs, a blank chat message is sent into the chat.

Steps to reproduce

simply wait for one to spawn naturally or spawning one in via commands does the same

Current behavior

no negative performance, just spams the chat

Intended correct behavior

I assume no chat msg should be sent, unless one is meant to (like a boss)

Server log file

https://pastebin.com/4DEB5bmR

Debug log snippet

[21:45:38] [Server thread/INFO]: MightyFinger77 issued server command: /mm mobs spawn SkeletalKnight [21:45:41] [Server thread/INFO]: (Extra: World:world, X:903, Y:111, Z:1281) [21:45:44] [Server thread/INFO]: MightyFinger77 issued server command: /mm mobs spawn SkeletalKnight [21:45:48] [Server thread/INFO]: (Extra: World:world, X:894, Y:111, Z:1288)

Proposed fixes

I have no idea, i've spent hrs combing through the yml files looking for the culprit, maybe it is a conflicting plugin? Killing vanilla mobs doesnt have this issue.

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