Bug with duplicated content

I created 2 tabs, but all of their contents are duplicated each other.
Also, I checked the code, besides the visual editor (the code is correct too)

look please my page https://test.h912259610.nichost.ru/mebel-dlya-personala/smart/

And video https://drive.google.com/file/d/1A-NVVR0TIzAqRvIohKgQqlIPrBGVq5zY/view?usp=sharing

I tryed to copy and paste the content (using the visual editor and code) and create a new tab, but the problem presists.

Help please!

• This topic was modified 3 years, 1 month ago by larets.

The page I need help with: [log in to see the link]