CONF-24038 introduces creation of macros via autoformat when wiki markup macro syntax such as

is typed. The replacement of the text with the placeholder is buggy though in two big ways:

1. There's a delay between the removal of the original text and the replacement with the image placeholder. As a user, it seems to just disappear, sometimes for quite a long time, and then the placeholder suddenly appears. It's really offputting.
2. The placeholder once it arrives tends to end up in the wrong place. I guess it ends up wherever the cursor is at the time the request for it returns. It really should end up where the original text was though. At the moment I can often type quite a bit between the initial text disappearing and the placeholder appearing, and the placeholder doesn't end up where it should.