ZBrushCentral

Polypaint distorts UV map

hi thanks … i almost finish my texture paint
then when select on TEXTURE MAP > new from polipaint
distorts some of the UV … i attach a video link and pictures of the result
please help … i just need to export my 4096x4096 polypaint texture outside zbrush in jg format …thanks

video link:
https://youtu.be/ablK7-DDCo4

and 2 pictures:

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Screen Shot 2021-10-16 at 1w0.39.01 AM copy