You are correct, appearently it was the case of the 8000 channels limit.

It appears that in some cases channel saving (after scan) depends on saved channel in a nearly located transponder: some services cannot be saved. For example, on 9E 12110 V 27500 Auto QPSK channels are saved cortectly. Scanned new channels on a nearly located Horizontal-transponder 9E 12110 H 27500...

Preferences->Localization->"Always switch to preferred language" can hang application (UI becomes unresponsive). It appearently happens if service audio pids or audio pid language descriptor changed since the last time. Unchecking the checkbox resolved the problem. Updating pid data ("Update all" in...