First, thanks a lot for mathjax shown in Anki. I love when you allow me to stop updating my add-ons! Especially when your feature is far better than mine!
However, right now, there is some actual trouble. If you delete an anki-mathjax with content (e.g. (\sqrt2) element and do undo (ctrl-z), it reintroduces the anki-mathjax element but not its content.
Also, to be certain that I understand decorated.ts comment correctly. There is no plan to switch ( for in the file format. We won’t have to update ankidroid to take them into account, right?