Looks like you may have "show samples" checked in your irradiance map settings.
either that or very low subdivs on glossy reflection.
There is a global sub div multiplier (under rQMC sampler) which increases subdivisions for everything at once but its probably better to isolate the problem.

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I have similar results with this kind of stuff when the geometry is dobbled within itself or if the same object is on top of itself... Im not sure if that makes sence, but if you hit shift and click on the object it tends to make a duplicate without it being actually moved. the result is what happend with you and the red glass... check your geometry if nothing else works.. just in case ;D

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MuS@shiROth

i think because it's need more image sampling and subdiv reflect... agree with tyson..

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i'm from indonesia

sorry my english is bad
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