Mroblem with hiding elements on mobile

Hi, I created a new archive layout for the Valentine’s Cards category. I added an HTML block above the products and wanted it to disappear on mobile. I enabled “Hide on Mobile Portrait”, and everything is fine. The block isn’t stuck on the first page; on the second page (I have two product pages), it’s a real mess, and the block keeps appearing.
Note: The problem occurred only on mobile phones; I changed the browser size on my PC to narrow, and it looks fine. I cleared the cache and CDN.

Please take a look on mobile, and if you can help, thank you.

Piotr