Glissando does not work properly when start note is altered

Start with the file glissando malfunctions.mscz

• Change the First E to an 8th note
• Make the 8th rest created an 8th note (press E)
• Double click the glissando to put it in edit mode
• Move the left anchor to the second E using shift+right arrow
• Select the first E and press + to tie the notes together

Play the song. Notice that the first E is not held for the 8th note duration prior to playing the glissando

Bonus bug

• delete the glissando

It doesn't go away unless you either copy the measure somewhere or reload the score.

This is very much a corner case, hence the low priority. The workaround is to enter it the way you want it in the first place.

I didn't check for a regression.