Recently I have repeatedly encountered a bug with the Markdown code block button. I’d usually select some block of code and click the button to make it indent by 4 characters and everything works.
Except that sometimes, a somewhat random string is added to the first line (the string always appears to be some parts of CSS).
Right now I can reproduce this only with the text
visible being added in front of the line, but I did have different and also more broken text lines in the past. If I encounter any other later, I’ll add those as well. Anyway, here is an example where I just typed
Foo bar, selected the line and clicked the button: