Wait... What?
Yes :) I had thought I couldn't get my point across correctly the first time.
Properties drawers do not contain blank lines. If you hit <RET>, this is
no longer a properties drawer, but a regular one, where auto-filling is
allowed.
Of course. But "the right thing" would be to prevent call to auto filling within `org-return` (somehow? I haven't yet dug deeper into that) if point is in a property drawer.
If you want to add a new property, use C-c C-x p, or, if you insist on
typing it manually, use C-q <RET> instead.
C-c C-x p is a bit unnatural and also longer to type than RET, especially if the point is already inside the property drawer. Yes, if my point is inside the subtree, and I think of adding a property, C-c C-x p is great!
C-q RET is a good tip, but again, RET would be better.
I'll try hacking something around this, tweaking org-return should work using a simple advice. Would a patch be welcome for this?