I'm sure there are always people saying this, but legitimately - I have noticed more of this in the last 6 months or so, at least in what I'm watching.
It's kind of perverse because that whole law about the commercial loudness
has been in force for all of this calendar year, I don't feel like it has changed things much.
My Vizio has SRS TruVolume
built into it which is supposed to rectify exactly this, though my audio does go out of the TV via optical and into a Zvox, I believe this setting is still processed because it lets me modify a subset of the audio settings with the TV speakers set to off still.
Evidently this is a rather difficult nemesis to chase down. . .we still want to hear our explosions in movies and baseball bats hit baseballs and drivers hit golf balls and all that other stuff that is a pretty sudden drastic change in dB.