S and Z yarn question

I’m exploring tablet weaving, and I didn’t think to check yarn twist when I bought yarn from different places. (Number 10 mercerized crochet cotton.) I like the look of weaving with all S yarn more when the tablets go forwards than reverse. Now I’m wondering what will happen when combing the two types.

Has anyone used S and Z yarns together and had a bad experience?

Also, I’m now wishing yarn manufacturers noted twist direction on the label!