We purchased some tangential screens to fit in our electric radial extractor as the bees have been very busy backfilling the brood boxes and not wanting to move it up into the supers. When we extract from the larger frames the honey that comes out into the bucket is always very light coloured, opaque and produces a quite thick foam. This only happens when using the tangential screens, and it is as though the honey is being whipped as it it being extracted. We only run the extractor at the lowest speed and then turn the frames half way through the extraction. Is this semi whipped honey normal when extracting tangentially?