It looks like this is related to the resampling. I guess you have used the general resampling tool.
This does not cover the specialities of S2 data.
Please try the one which is in the menu at Optical / Geometric / S2 Resampling Processor.
As you can see in the attached screenshot the view angles are not correctly resampled by the generic resampler (the left side). This causes C2RCC to fail in these areas.
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