Why does this happen(glue tool bug)?

This happens when I group-glue notes.
Any ideas as to why this happens? Or is this a known bug in 8.0.10?

Hi,

It shlould works like this, when you hold Alt modifier on your computer keyboard, during the gluing.

Please, make sure, you didn’t change your preferences. Open Preferences > Editing > Tool Modifiers > Glue Tool. Here, you should see Action: Glue All Following Events; Modifier: Alt.