Describe the bug
'Mute Myself' sometimes leads to maximum level of My channel. In these situations it is not possible to change the level of My channel. It stays on maximum.

To Reproduce

1. set 'My channel' to any level below maximum
2. enable 'Mute Myself'

Expected behavior
'My channel' should not change level.

Operating system
macOS Big Sur 11.4, iMac Late 2015, Apogee Element 46

Version of Jamulus
3.8.0