Portamento glissandos longer than an octave cause squeaking
Steps to reproduce bug:
Enter two notes, the first being higher than the second (issue does not appear when the other way around), and the second being further than an octave away. Note length doesn't necessarily matter, but it is easiest to hear using quarter notes. For example: two quarter notes, the first being C5, and the second being B3.
Click on the first note, go to the "Arpeggios & Glissandi" palette, and click the "Straight glissando" to add a glissando between the two notes.
Click the glissando. On the Inspector panel, under Glissando -> Style, change the Play style to Portamento.
Click on the first note again, and click play at the top.
The first note should perfectly glissando into the second with no squeaking.
You will hear that towards the end of the glissando, the midi seems to wrap around to the top and make a squeaking noise. The further apart these notes are, the more prominent it is.
Version 3.6.0, revision 28aa7ba, nightly build. Also appears in version 184.108.40.2067915773 revision 1977cb3.
Windows 10 Pro 20H2.