When using Private Browsing, New Window and New Private Window fail to open from Menu and Dock
The following issue is occurring when I am browsing privately (the below issue does not exist when browsing in non-private mode).
I am able to open a new window using the keyboard shortcut Command + N and similarly a new private window using Command + Shift + N.
However, when I use File -> New Window / File -> New Private Window, nothing happens.
Similarly, when I use the context menu in the Dock (by right-clicking on Vivaldi in the Dock), nothing happens either.
Is this expected behaviour?
Just want to add that this problem is occurring on a Mac Mini with dual monitors but not on a Macbook Pro using the inbuilt display.