odd behaviour in script mode

I want to split a paragraph, so I put the cursor where I want to make the split (before "Then "), press return…
…and this is the result:
The paragraph has been split, but the second part is now highlighted, and the cursor has jumped to the end. The cursor should stay where is was.

Yeah, I get that too. No explanation, no solution and you have to be careful what you hit next or it gets wiped.

Thanks, I’ve got this on the bug list.