RE: adding an album cover when none is visible in the cover modal, i.e. it is blank β
What is the expected default behaviour upon executing the shortcut "Ctrl+Alt+A"? Should the Windows default file manager open the relevant album folder?
What do you consider to be the relevant folder?
Without a specific folder name for pictures, the folder of the currently selected file(s) gets opened.
See also the Options>Directories
You still have not said which folder you consider "relevant" for a particular file.
MP3tag cannot guess where a picture for a file may be hidden.
The intended behaviour to add covers is described in the documentation:
Thank you. I am applying %_parent_directory%, but for some reason, it does not apply consistently to the applicable track directory/folder. I am now testing and considering other options β as per said documentation.
Sidenote: Could the regular cleanup of the Mp3tag Library perhaps have any bearing on this event?
It first tries to load the folder that's configured as Cover art directory at Options βΈ Directories.
If this is empty or can't be resolved to a valid folder, it tries to find a file with one of the supported file extensions (jpg, jpeg, png, or webp) in the selected file's directory.
If no file is found, it opens the current working directory.