3D not working consistently with Sony XBR-55X850C
I have a Sony XBR-55X850C that I purchased about 4 years ago and I have installed Kodi on it and stream movies that I have stored on my NAS. I thought I would try out the 3D feature of this TV and bought some active 3D glasses (XPAND) and synced then with the TV. I have Creature from the Black Lagoon in mkv (SBS) format. I stream that through Kodi and I am able to watch the movie in 3D. I downloaded some sample 3D files from kodi.wiki/view/Samples (H(SBS) Alita Battle Angel Trailer) but when I play that it just shows two pictures side by side. It's almost like the TV isn't getting the signal to join the two SBS pictures together. Any idea why Creature from the Black Lagoon works but the other one doesn't?
Also, on that samples page I see some MVC samples. What's required to play those in 3D? I streamed it via Kodi and it was just a 2D picture.