Keenetic omni II.No buffer space available

Hi all! I've got a problem with my keenetic omni II. Sometimes IPTV stunned on a short time and I see "Io::PollableDgram: unable to get an available data size: no buffer space available" and "Hotspot::Discovery::Explorer: system failed [0xcffd03ac], operation failed." in logs. But when I check device status at the same time there no visible troubles: CPU load near 1% and memory usage not much than 51% (33 mb used from 64 megabytes). This happens very often and sometimes iptv watching becomes impossible because of video and sound pauses.