Identity ColorMatrix when used with other filters breaks filter behaviour

[brandondong]

Version

2.3.3

Test Case

https://jsfiddle.net/ojt42731/14/

Steps to reproduce

Press the Apply Filter button.

Expected Behavior

Sepia filter applied to image.

Actual Behavior

Image disappears.

I believe the isNeutralState optimizations may be causing this issue. If I change the values of the matrix slightly, the test case works as expected. In my real application use case, I was generating a colour matrix dynamically based on parameter values. It just so happened to land on the identity matrix causing this issue.

[asturur]

I see this is getting me headache, i guess i should remove the filters before getting them in the filter chain rather than in the middle of filtering, i have not time to setup a proper debug test with webgl, but looks like that removing the first filter causes the problem.