v6.79 Can't disable "Automation item options... -> Project default behavior"

[paat]

1. Create a track and make an automation envelope visible
2. Add an automation item
3. Right-click the envelope, click "Automation item options for this envelope" -> "Project default behavior outside of automation items"

What I expect: it gets unchecked, and I can set envelope-specific options
What happens: nothing - it stays checked

There is a workaround:

1. Right-click the envelope, click "Automation item options for this envelope" -> "Bypass underlying envelope outside of automation items" (this checks that option, and unchecks the "default behavior" option
2. Do it again to check the "bypass underlying envelope" option (this makes the three "Automation items... attach ..." track options available)

[schwa]

Fixing.