Birdtray doesn't remove T.B. from Gnome dock when Hide All Windows shortcut is enabled

[aindriu80]

OS:
Pop_OS! 22.04
Linux Desktop Manager:
Gnome
Birdtray version:
Birdtray version 1.9.0 compiled at Sep 30 2021 18:54:11 using Qt 5.15.2.
Thunderbird version:
115.0 (64-bit)
Birdtray origin:
package manager - apt
Qt version: NA
Description

Birdtray doesn't remove Thunderbird from the dock - see image

Everything is working as intended apart from the icon being in the dock when Thunderbird has been minimised.

Expected behavior

When you minimise birdtray it should remove the icon from the dock.

To Reproduce

1. Enable Hide all Windows in keyboard shortcuts on Pop OS
2. Hide Thunderbird
3. Note that Thunderbird icon is still in the dock

Additional context

The problem seems to be coming from the following shortcut - Hide All Windows - when this is enabled the Thunderbird icon stays in the dock. If I disable this shortcut the Thunderbird icon no longer stays in the dock (as expected).