I have spoken to s3v3nh4acks  the lead developer of PIVX

He says

How it happened?? You ha e a trojan on your system... no other way to do what u say happened, unless u dis it yourself or someone else had physical access to your system.
It isn't a bug, but if u think so, then you find it, show me provable and repeatable evidence and i will replace your funds... but you are wasting your time.

Which I replied with if I find evidence of a hack I'll buy another masternode!

Upon conclusion
Very big coincidence that this Happend while setting up masternode and was told to unlock my wallet.
When it comes to money u can only trust very few.
I will continue to try find evidence of the hack

The hacker did leave me with 6.8 pivx nice cunt huh.