File locking?

Hi all,

Am I missing something, or is Blender not file locking/checking a open .blend file?

I found out by accident that if you have the same file open in two Blender references, both Blenders can save the file without any warning or issue. Which can end up in big work losses as one just removes the changes from the other…

This is in Windows, not sure if this happens in Linux as well.