I am monitoring 81W 12010 V 13333. I find I can receive and lock onto a stable 10 dB data transponder here on 24/7 using Tuner A (DVB-S2X) but using Tuner B (DVB-S2) I receive nothing. I can't even tell there is a fairly strong transponder on that frequency. I recall encountering this years ago when monitoring a data transponder on 22W. Same results I'm seeing now on 81W. I had a different Mio+ box in those years.

Am I right to conclude that there is nothing wrong with my receiver but simply that there are some transponders which DVB-S2X can handle whereas DVB-S2 can't?