so… we are not sure what you have done that this happens.
I can’t verify whether a possible issue exist for Steam-Userw which not use the default installation folder, because I used the Default… or whether you made something special.
Because you use the Dev-Mode ( which should only DEVELOPERS do ) , you can have a look into the “virtual file system - mount points”.
Otherwise no future idea… Possible there are other Steam-Users here which NOT use the Default-Install-Folder and can share it’s experiance.