Have had an HTL9100 for a few months now, and super happy with it apart from a perhaps minor annoyance.

Volume for some reason now jumps to high levels whenever I swap between sources (tested with HDMI 1 and 2, ARC and bluetooth). I can be watching TV and have the volume set on fairly low (2/8 led indicators), but if I switch to something else, it suddenly jumps up to 6/8 led indicators, scaring the bejesus out of me. Bass and treble seem to also revert to full levels along with the volume, making for a proper boost compared to what I was going from.

Is there anyway to adjust the "default" volume of the soundbar? Have tried doing a factory reset but that doesn't seem to work (after shifting to AUX and holding Night Mode Off for 5-10 sec, nothing happens - no reset, no blinking lights of any kind either).

I have a Philips 50PFL5008T connected via ARC, and an Apple TV/PS4 on HDMI 1 & 2, if that could be relevant somehow.