Settings if it should open new tab when going to new location of tab is locked is already added in the current beta
Somehow I think you are misunderstanding the point of this topic.
Regardless of whether I have the option checked or not, whenever I move
UP the path a new Tab is opened.
"Lock Tab - Allow subpath change" is great, I use this ALL the time on my locked tabs. It keeps my locked Tab and all the sub-folders together.
That option is not in question. It does what you intended and what I need. It is the moving
UP the path that is broken.
Sometimes when I click, " .. ", to move up the path, I sometimes click again by mistake and a new Tab opens with the parent folder.
It shouldn't! That is the aspect of 'Locking the Tab' that should be addressed.
A simple error message or audible error tone or something, just to alert the user, "Sorry, you don't want to go that way, you have locked the Tab."
Likewise clicking the higher level folders in the pathname shouldn't be possible when this option is chosen.
C:\TopLevel\SecondLevel\ThirdLevel\
FourthLevel\FirstChildLevel\Folder1\Folder1a\Folder1b\
In this example the locked Tab is
FourthLevel. All the folders under this should, and do, open in the same Tab.
Anything above that, C:, TopLevel, SecondLevel or ThirdLevel should return an error message of some kind indicating access from this 'Locked Tab' is denied.
Otherwise the functionality of 'locking the Tab' is gone. I can move freely up and down this directory tree without locking tabs, all locking them does is start a new Tab. If I wanted a new Tab I can simply
Ctrl-T and make one using the current folder as a starting point.