Do you know why this happens all of the sudden? and why Ctrl+Z is not working?
(I’m working on a logotype, with more letters inside one Glyph.)
I don’t know.
Can you send me the file?
I’m not really sure what happened. I suspect you accidentally invoked “Connect Open Paths” or something like this.
you might like to try corner components to reduce the number of paths: https://glyphsapp.com/tutorials/reusing-shapes-corner-components