[Mecool KI Pro] does not find channels on 122 MHz freequency on DVB-C

Hello,
is there a reason that my Mecool KI Pro doesn’t find channels on 122 MHz frequency on DVB-C? I could imagine that there might be a lower frequency limit in the driver or in TV Headend. TV Headend doesn’t search channels on this frequency if I trigger it manually and shows result error. Does anybody have the same problem? Is there any possibility to solve that problem? The tuner is avl6862.