When a player disconnect during PvP, his Skin is duplicated in spawn and same thing for his nick.

http://image.noelshack.com/fichiers/2016/32/1470653030-2016-08-08-12-42-57.png
http://image.noelshack.com/fichiers/2016/32/1470653038-2016-08-07-12-44-29.png

I use the latest dev build and my server is PaperSpigot 1.7

I use this: http://ci.md-5.net/job/PvPManager/238/
But with officiel version there is same problem.

It doesn't happen if you remove PvPManager?

Yes

I've found the cause.
When:

Kill on Logout:
      Enabled: true

This problem happens.

But if:

Kill on Logout:
      Enabled: false

This problem doesn't happen.

Only in 1.7.10 (not in 1.8.8)

Just disable kill on logout then, sorry won't fix this one.

You are using the premium version of PvPManager right?

No