There's a new banner shown on some of the technology Stack Exchange sites:

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Every podcast episode now seems to be similarly advertised:

Podcast Episode #126: We chat GitHub Actions, fake boyfriends apps, and the dangers of Legacy code. Listen now.

When I dismiss these banners on e.g. Stack Overflow, I expect them to disappear from other sites as well. But that doesn't happen.

I regularly visit a lot of sites in the network, a permanent solution would be most welcome.