I have a setup with a TVheadend server, HTS Tvheadend 4.2.7, on Arch Linux, 4.19.12-arch1-1-ARCH.
For the disc I have a monoblock LNB for Astra 1 and 2 resp. 19,2E and 23,5E with four outputs.
After a couple of years my TBS6981 adapter stopped functioning, didn't got recognized anymore, and I bought a TBS6902 to replace it.
After I had the TBS driver installed the tuner looked OK but I had problems with tuning to some channels.
Strangely they were all channels on the same mux so I rescan that mux/tranponder.
It did find some channels but they where on the wrong satellite. Despite the network settings it scanned at 19,2E where it should be 23,5E.
Most muxes/transponders functioning well, a couple does not.
After that I installed the drivers from the Crazycat media_build but they perform exactly the same way although the tuner is recognized as Tmax TAS2101 instead of TBS-6902.
I reinstalled TVheadend and in the proces lost all my settings so now I have a clean installation but still the same problem with some transponders.
The ones that are troubling me are:
23E, 12187500, 29900000, 2/3, H and 23E, 12109000, 27500000, 3/4, H.
After the scan it reply's with the network ID "1" which should be "3" like other muxes on the Astra 3.
As you can see in the screenshot the provider network name is filled in automatically with ASTRA 1 after a scan.