Dear, Chucky!
Few months early ago i'm writed two post to sat.hu forum. The post showing, how its works the 5G system in the many countrys.
Your problem not 5G radio signal, but the your used system, and/or system connected pieces, the cable shield, DISEqC switch, and connector shileds, and the interferece, in the 950-2100 MHz band range
The example, to the your anomaly.
You need the receiving any C-band signal. This signal frequency higher than that 5G frequency, but!
Your LNB converter, converting C-band signal to the lowest 950-2100 MHz, this band maybe the anomaly.
If need you the C-band signal receiving, this frequency band or spektrum not yor problem cases, because not same the receiving as 5G frequency, because the broadcast reception frequency highes, not 3,4 GHz or 3,8 GHz.
Example:
The infterference, and harmonic maybe present, the 950-2100 MHz frequency range.
And more one importatn.
The LTE filter, not filter, only this "name".
This function, cuts it out the 3,4-3,8 GHz range, ergo the LNB oscillator not converting to this signal range, so there is no interference, therefore, the satellite receiver does not detect the interference.
(Sorry, i dont speak perfectly English.)
Bests, regard
SaTom