I want to clarify that the Retrotink only, connected in HDMI, works perfectly with my Sega Saturn, connected directly in RGB on the OSSC, doesn’t encounter any problem. I updated the OSSC with the latest firmware (0.82) and that does not solve my problem.
Can you clarify exactly what you mean here? You’re connecting the Saturn how, exactly? You can’t connect RGB to RetroTINK.