Bitwarden Extension icon disappeared from Opera Developer 78 Sidebar

Since Opera Version 78.0.4066.0 the icon of the Bitwarden 1.49.0 extension disappeared from the Sidebar.
When disabling and re-enabling the extension the icon appears for 1 Sec. and disappears again.
Tested on three different devices.

Opera version: 78.0.4079.0
Windows version: 21H1 (Build 19043.1023)

Can anyone confirm this?