<b16> RegEx - more inconsistency when searching for spaces

Search options are set to: Text + RegEx + Search in Included documents + Search in Excluded documents.

b[/b] or (^[ ]) or b[/b] should locate paragraphs that start with a . It finds none of the documents containing such a construct. Instead it shows documents that have an image pasted into them.

b[/b] or ([ ]$) should locate documents where one or more paragraphs end with a . This finds a couple of documents but misses 99% of them. (Not sure if it’s relevant, but the hits were for non-English text)
b[/b] finds all of them, but \s is not the same as [ ] in RexEx.