Drag-Drop Onto Taskbar Icon for New Instance Not Working for Long Filename-Enabled Program

Hello, so an experimental build of VLC has long file path/file names (or more accurately, UNC -> "\\?\") enabled. 7+TT's feature of dropping a file onto the taskbar icon to "open with" is enabled, but is not working with this build of VLC (it works for other programs). I know that original VLC builds were fine. I can only imagine for now, that this is happening because 7+TT is does not have long filenames enabled. The actual filename's char count doesn't seem to matter, it's more like this build of VLC is prepending the character which is perhaps not playing with 7+TT (just my ignorant speculation). Would like to hear back and if it is the case, would love to have it enabled.