After initially raising this years ago and getting no response or explanation, I have just learnt to ignore it. Yes it is irritating. But now that you mention it I will look out for it again and report examples.
I noticed this morning on FFW on SABC2 that when resuming playback that the sound was missing for a few seconds.
Easyview, UEC 4T HD PVR, SD PVR, XV
Spare decoders: SD PVR(2), PACE HD PVR 4T, DSD 660, 1110, 1131, Explora
2 unmentionable FTA decoders
Win 10 Pro (64-bit) build 1607, version 14393.351
1.2m antenna, 8-way universal LNB, 2x6 MS, FSM permanently connected.