Unable to add MP4 files to queue
 

Unable to add MP4 files from SAMBA share to play queue. All files are playable, toast message says '1 file(s) added to play queue', '4 file(s) added to play queue', but play queue remains empty.
Adding to playlist though works fine.

Also I can add files to play queue by selecting them directly (not by folder), but the order in which they are added to the queue is totally messed up (so as I don't understand the sorting in playlist).