Passthrough lag in Unity

We are experiencing a lot of lag in the passthrough image in an PC aplication using the cable link conection. The virtual environment if in a good fps, but the passthrough is in a low fps and with a delayed image.

We are using Unity with the the lastest SDK available in a top tier PC. The passthrough image outside the link is fine, without lag.

We would like to know if there is anything we can do to reduce this lag.