[KevinH]

Yes, this must be something the new pcre2 module changed.

I will look into it.

In the interim use:
.+

which will find all non-empty lines

Or Turn on the Minimal Match flag and the DotAll flag in Regex options then search for the following:

.*\n

it will return each line (empty or not) and its ending line feed.

Somehow pcre is not advancing its internal search position when the search string is ".*" because a zero length string is also a match for this case.

Very strange.