Yes, clean config on two different computers, Windows 10.
I can set the cursors with Ctrl+Click, or with a selection and add-multiple-cursors.
The order that the cursors is set seems to make some difference.
Given a text file with 27 lines
Ctrl+Click on line 25, 20, 15: After losing focus lines 21 to the end are "-1".
Ctrl+Click on line 15, 20, 25: After losing focus lines 16 to the end are "-1".