Can't delete a global guide

Glyphs
1

I’ve discovered a global guide in my font and can’t delete it. When I select the guide and press Backspace, nothing happens. I’ve tried to delete it from every glyph in the font with no success. Any ideas how to delete it? Thanks

2

Is the guideline locked? (i.e. does it have a lock icon?) If that’s the case, you need to unlock it first, from the context menu.

3

This is one of those old bugs that comes and goes with updates. I can always delete the stuck guides after quitting and restarting Glyphs.

4

For some reason today I was able to delete the guide without any difficulties. Thanks for help!