White yarn problem - very rough

Is it me or there is something wrong with white yarn? I tried different models and always have the same problem: yarn is very rough and it is hard to work with that.

But the problem is only with white color... Any other colors are very soft and I really like to work with them.

I tried YarnArt Jeans, Gazzal Cotton and Alize Cotton - same problem, only white color...
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