Lists redirecting to ad sites

Anyone else getting this? Whenever I'm looking at or trying to update a list (in safari on iOS) I'm being redirected to ad sites constantly (this url mobfree.click/xtv/NTY4OWFhMjg5NWVlYTg5NTE1NjAyMw==) it's incredibly annoying! Can't see that anyone else has mentioned the issue though?

It's happening on my mobile (Chrome/Android) but not on my laptop, probably because I use Adblock for Chrome.

Thanks for the reply! I actually thought it was just Listal it was happening on but noticed it today somewhere else, it is to do with advertising on certain websites.
Still, annoying AF & makes me just leave the site when it happens.