EDIT: Fixed in v6.48!

THANKS!
If I have same named script file on root drive (M:\) of portable install, then that script file is open instead of the one the action is actually pointing to in Actions list ("M:\Reaper Portable\Scripts").
Win10_x64/REAPER v6.46, Not sure what version this started happening or if its always been this way but if not careful you could edit the wrong script file!