Winsorized Sigma Clipping Problems In Dense Star Fields

[jimwaters]

Winsorized Sigma Clipping produces a X,Y grid star pattern on medium to dense star fields such as the Milky Way.  I have seen this several times.  Its "very subtle" especially when the images are saved as JPEG. The problem goes away if Sigma Clipping is used during Batch Preprocessing.
 
Is this a known problem / limitation or am I doing something wrong?

[Juan Conejero]

I cannot reproduce this behavior, and nothing like this has been reported before. There is no reason for Winsorized sigma clipping to do this. Can you upload a data set where this can be reproduced consistently?

[jimwaters]

I am trying this on another wide-field image set.  Give me a day to get the stuff together.

[jimwaters]

Juan - I am sorry but I can't reliably reproduce this problem.  It was there in an older PixInsight release.  The data set (images) I was using were not ideal.  When / if I come across it again I will repost.  It only occurred in dense star fields at that time and as I mentioned was very subtle.