Line below spontaneously cursor indents while typing

Testing version:
Version 2.0 (9916)
What were you doing:
What feature did you use:
What happened:

What did you expect to happen:
nothing other than my typing

Unfortunately, this comes from a strict following of markdown standards. In markdown, lists need an empty line to be terminated otherwise the last element is interpreted as a second line of the same list element.

That makes sense.
I suppose that what seems strange is that it happens whilst typing and before I’ve had a chance to create that empty line (or moved away without creating it). Not sure that I can see an easy way around that.