@jaytor you can set your gaia to "000" and then try different I2s setting on the Terminator. I had to do this on my Hermes/Venus II and it works again.
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Please go through the guide detailed here:
https://www.denafrips.com/
Suggestion of I²S matching of the Transport & DAC
1. Connect the I²S cable (good quality HDMI cable <3ft/1m)
2. Turn down the volume (audible, minimal)
3. Set Hermes i2s to mode 000.
3. Play a familiar music (PCM first, followed by DSD)
4. Run through the I²S setting of the DAC, 000-111
5. One of the modes should match with the source for both PCM and DSD playback.
000 (1X 2X 4X LED off)
001
011
100
101
110
111 (1X 2X 4X LED on)