Thank you for the answer.
I update theme to new version. Thank You.

Yes, i have only 1 produce and 10 brands.
Yes, i have only 1 product with brand attribute, but this brand is not displayed on product site. This is problem – NOT DISPLAYED!

Have you seen my videos that I added for you on youtube? Can you watch?: https://youtu.be/NemvttAp-Og

i added all brand (10) — it’s OK – in product is 10 brand
I added 1 brand: X — it’s OK in product is 1 brand X
I added 1 brand: Y — it’s NOT OK in product
I added 2 brand: X and Y — it’s OK in product is 2 brand X and Y

Can you set the “maxcom” brand to be displayed in this one product?