I've noticed this issue in the last few versions of Sigil (9.12 and 9.13). In book view, pressing enter to split a paragraph into two will automatically add a space (nbsp

to the start of the second line. for example:
to
to
instead gives
in code:
Code:
<p>Hello</p>
<p> world</p>
Searching this forum has only given me issues people have had with nbsp;s [intentionally] being used
instead of spaces in book view. My issue is slightly similar but may be related.
Is this intentional for some reason? It's a real pain when I'm converting ebooks and am looking to quickly split paragraphs without having to paste in para tags.