Can't expand hidden lines in Notepad++, Triangles disappear

Question

I'm writing a file that includes both HTML & JavaScript.

Just today I found that I could hide rows by selecting them and right-clicking the line numbers (select hide rows). Green triangles appear that allow you to un-hide them again.

Cool! I can finally colapse huge sections of html while set to JS language..

Except the green triangles disappear and a gap in line numbers persists!! You need to exit notepad to get them back.

Other forums like notepad++'s don't seem to be understanding the issue.

edit: Here's how i reproduce it - hide a few sections of lines, now expand one of the sections, all of the triangles disappear. I re-added the two hidden sections for the picture to show a correctly functioning hidden section.

Answer 1

Another way around this is to select text above and below the hidden lines as a block, then use the context menu to change the formatting to something like UPPERCASE. This causes the hidden text to reappear, at which point you can issue an Undo command to put the text back as it was.