Spriter and WebGl problem

Problem Description

A single sprite in the Spriter animation seems to have a shader effect of some sort, but the shader itself is nowhere to be seen. Animtaion is ok, but this effect just appeared from nowhere upon starting project. The scene is clean and nothing but importing an .scml file(and .scon too) was done. Please help me on this one. Thanks in advance.

Capx

https://www.dropbox.com/s/gcrt1nd16dam2 ... .capx?dl=0

Description of Capx

As I said, this does nothing. except there might be some settings I am now aware of, which is hardly true.

Observed Result

The head becomes white. I also tried this with different sprites

Expected Result

the head should not be white

Affected Browsers

everything with webgl

Operating System and Service Pack

Same on windows 7 and 8

Construct 2 Version ID

178

Edit:

I was able to solve this problem by assigning another object to head bone, and then removing it. I still don't know what caused this issue.

If I delete the Spriter plugin, it appears to render correctly. This suggests it is a problem with the Spriter plugin, not Construct 2. The Spriter plugin is maintained by Brashmonkey, so please report the problem to them instead.

Already did. Noone has any clue, but in case anyone has the same issue:

I was able to resolve the problem by deleting the head from every animation. After that i just assigned the very same sprite to the bone again, and it worked.