Yes I am using multimonitor and have displayfusion set to always open winscp on 2nd monitor. Nice catch.
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
I can also confirm this go to line number bug with the internal v5.0.7 editor.
On a similar subject I found the other day another bug which will lock up the v5.0.7 editor, apologies for not posting it earlier. ...
There is one nasty bug that hopefully gets fixed in the next version. When I open a text file using the default editor and try goto some line number WinSCP freezes up completely and the only way to get it working is to completely shut the winscp process down in Windows task manager. This is obviously a significant inconvenience when you have several tabs and putty consoles opened and various things going on.