Escape Room/The Special One

Most of the storylines with teenaged B&B in the 2022-present series don't include anachronisms of technology that didn't exist in the 1990's (few episodes reference the Internet or smart phones, for starters) but there are some other anachronisms. In one S11 episode, teenaged Beavis talks to a rabbi about the first IRON MAN movie, which wasn't released until 2008. In another, they steal Amazon delivery items; while Amazon did exist in 1993, it wasn't doing things like that on a massive international scale yet.

When Beavis returns to the burning dumpster after running around the school track, there is a visible sweat stain around his collar. The sweat stain disappears in the next shot.