ofxLayer doesn't alpha-blend layers

Hi, I’m trying ofxLayer https://github.com/satoruhiga/ofxLayer then found that example source doesn’t overlay existing 3 layers properly on oF0.9.8(for other version i haven’t tried yet).

Does anybody have the same problem on this?
I’m pretty not sure whether fbo or Layer causing the problem.

Thank you for your help!

I found this guy already solved the problem. Just let me check what the hell happened.