Hi.
I have two S2X-FBC in the box, both have two "lnb in" (of cource you know that : ), but I have only one cable attached to each tuner.

I have noticed that when a channel is recorded I can't switch to that channel from another channel without problem, "Tuning failed" and "Timeshift is impossible" is flashing. Especially if I record two or three channels simultaneously.

I tried with only one tuner in the box and used 2 cables into the lonely tuner, but same problem...

I have to admit that I do not have full control over how it works with 2 FBC installed, but I think I have configured them correctly.
I use 2 standard cables straight from the head.

I have debugging activated if someone want to se it.

I have same but only 1 S2X in my Ultimo 4k, and I don't have this problem with that box.

Tuner settings...

tuner1.jpg
tuner2.jpg
tuner3.jpg

Any ideas?

Thanks!