One part of the problem is that the “Load Custom Camera X” commands do not act like other “Load some view” commands … but they are “Toggle Custom Camera X” commands.
I have no idea when this changed but I am pretty sure this was not the case a loooong time ago, when I did test all the view commands in late 2020.
I created a related bug topic for other view commands over here, where that “toggle” nature of “load” is also listed: