skylink, I have old enigma system with card in the upper living room. This decoding problems were definitely not present in the 8.2.1.1 and older. It almost seems like broken vpu code. I'll check further, not sure if it is or not only FHD related.
Found a thread regarding live tv stutter. Live-TV stuttering since 8.1.9
jirkan Ftelf , what about the tempteratures and SD card you are using? Had similar issues randomly, and it was caused by SD card (used quite often recording), I'm on KII Pro using DVB-S as primary and DVB-C as fallback (built in tuner), additional USB DVB-T as an fallback of the fallback no issues with struttering now.
PS: using same provider as Ftelf for DVB-S