Tvheadend

Hi,

I am very new to tvheadend, I am using Ubuntu 21.04, HTS Tvheadend 4.3.0~pre+202106121356-0~built202106130417~giteb59284b8~ubuntu21.04.1 and a "DiBcom 3000MC/P #0 : DVB-T #0".

What happens is that sometimes scanning either stops after a few mutexes or just does not start at all.
Before opening issues or bugs, I tried to google it, but I could only see issues very old (which are likely fixed by now).

Is scanning a very delicate process that is expected to fail with the "wrong" mutex?
I live in an area where I get frequencies from different transmitters, so I added a few.

Not that it makes a big difference, even one can hang.

Do I need to add manually mutexes one by one to see which one is problematic?
Is there a way to see which mutex is hanging?

Cheers