For the past day, some players have not been able to take damage whilst still being able to hit people, sometimes this was also reversed. I first thought that this was to do with pvpmanager and had tried toggling it on and off but it still had no change. I found an error in my logs which looks like it would be the issue to the pvp problems but idk atm.

Here is the error: http://pastebin.com/XixMprJA

Using latest version on spigot 1.8.7

So regarding the issue, when a player has newly joined they cannot take damage but if I do a restart, they can. Does this relate to the issue I have been having? This is pretty urgent.

Seems to be fixing itself after a while now without newbie protection, weird but I still think that the error provided has something to do with it. Sorry for all the replies so far, just trying to keep you updated on what I know.

Check if latest update fixes this issue please.

Still getting this (or a similar issue)

Error: http://pastebin.com/692LaVvh

Hmmm, can you list me all plugins you have using scoreboards?

I use featherboard.

Just featherboard? Well, i will try to test and reproduce the bug then.