Not sure, but probably not. Did you make sure to check “Downconvert DTS-HD to DTS” in tsmuxer? If so, then it’s likely that the mono mix just doesn’t have a DTS core.
It’s actually not possible to create DTS-HD MA tracks that don’t have a core. DTS-HD and DTS-HD MA are extensions to the standard DTS format, and as such, all contain a standard DTS core.
If you want to try a different extraction method, use eac3to. The command line will look like this:
\eac3to “inputfile.dtshd” “outputfile.dts” -core.
If you want to decode it to PCM losslessly, use:
\eac3to “inputfile.dtshd” “output.wav”
Easy peasy 😉
Jedit: Link to eac3to: https://www.videohelp.com/software/eac3to
Just extract to a folder and run under a command prompt, or you can try out the useac3to gui.