↳ In-reply-to » It's also (expectedly) in the feed file on disk:

@prologic@twtxt.net Yep. Doesn’t matter if JS in turned on or not. So it is somewhere hiding in the Go core. Some replacement going berserk, I’d say.

It happens to each bracketed text individually: https://lyse.isobeef.org/tmp/bracketed-text/triple.png

But then the question still is, why on earth does it happen to old twts, too? I’m getting into my code excavator.