"Copy to right" doesn't work under special circumstances (left nothing, right additonal emtpy line)

[rondlh]

In the image below, the right file has an additional empty line, which I want to mirror to the right (delete the extra line), but the "copy to right function" doesn't do that, nothing seems to happen when I click "Copy to right".

I have "Ignore blank lines" enabled, perhaps this is the cause.

[sdottaka]

Enabling "Ignore blank lines" will ignore differences in blank lines and make the background a light yellow color. As you might have guessed, the ignored differences are not eligible for copying.
Disable "Ignore blank lines" to copy the differences.

[rondlh]

This behavior is a bit odd in my view, WinMerge shows me there is a difference, and give me the option to copy it, but just ignores me when I select it. In my view it would be better to:

1. not show the difference
   OR
2. copy the difference if I use the copy option.
   Showing me a difference, but not letting me copy seems not logical.
   I do not like to toggle "Ignore blank lines" the whole time just to copy these blank lines.

UPDATE: Even more illogical is that if there is a blank line on the left, but nothing on the right, then "Copy to the right" works fine (with "Ignore blank lines" enabled).