I am not having any luck getting the DTSX bumper to play.
I have tried having .dtsx in the file name, alongside other tags (e.g. moviename.UHD.DTSX.HDR.mkv), and just .dtsx (e.g. moviename.dtsx.mkv), and both upper and lower case, but it still always plays the DTS HDMA bumper.
My AV receiver shows DTSX for the actual movie and checking the file with Media Info also shows that it is a true DTSX file.
I am using v0.1.3