@BeckyEbook
Okay just pushed that change. It appears to work to me.
I had it look like the following:
Code:
<div>top</div>|<div>bottom</div>
with the cursor being represented by the '|' char and hit Split At Cursor.
I got back what I expected.
If this actually worked in Sigil 1.4.3 and earlier it was by accident.
Now it will make all earlier behaviour official.
Thanks for your bug reports!