Audio files missing in dropdown list

Link to .capx file (required!):

Steps to reproduce:

1. Successfully import many audio files into Sound folder, both ogg and mp4. Move files from Sound folder into subfolder Chapter1 for keeping it well organized.

2. On event sheet add Audio -> Play

3. Select drop-down list

Observed result:

Only half of the sound files are visible and can be picked from list; other files are not listed

Expected result:

All audio files listed

Browsers affected:

Chrome: yes/no

Firefox: yes/no

Internet Explorer: yes/no

Operating system & service pack:

Windows Vista with all current SP

Construct 2 version:

    141

Please close this topic. Dropdown list sees only pair - ogg and mp4. If one of it is missing, under the same name of course, files are unaccessible from the list.

Best regards

Closing, note we wouldn't have investigated this anyway without a .capx, and the AAC format extension is .m4a (mp4 is for video).