Disconnecting after boss runs

Description of the bug:
I disconnect a few minutes after killing bosses. This has happened to the last 5 horntail runs I've done. No problems throughout the run whatsoever. Once the boss is killed and we're taking a screenshot or when items are getting looted I disconnect to the login screen. I now always lose my horntail buff which sucks since we usually then go to kill the boss.
It also happens at scarlion, I've been running scarlion every night for the last 5 days. I always disconnect after killing him. Once I disconnected before looting anything.
Not sure if it's linked but it also happened once I completed my 2nd job advancement on my nl.
What is supposed to happen?: Not meant to disconnect and feel like killing myself
Where did you find and/or notice this bug?: Boss maps
A step-by-step guide to re-producing this bug (optional): Kill the boss
Extra information (optional):

 

happened again today...

 

problem is still there...
I always dc after horntail now
Killed an anego today, went to fm, dc'd shortly after.

 

also disconnect after i pap...

 

dc'd after manon, dc'd again after ht...
also sometimes i dc when i enter fm.