Problem with Find/Replace Text Action

Hi,

I am currently having trouble with the Find / Replace Text Action.
I am able to find and replace one line in a file but when the match exceeds one line, the find works but the replace doesn't.

Is that a known issue ?

Also, is there a way to completely remove a line when using that Action ?
I only seem to can replace that entry with an "empty string".

Best regards,

Luc