[wrap]-token issue in rich text editor in 3.5.0 revisited | What should I do instead?

I’m having the same issue with the [details] tag, from the Details plugin, which is part of core now … any clues? Is there a way to make it work in the new RTE right now?

Interestingly, it gives that error even in posts where I didn’t include any [details] tag.

Using 3.5.1