The Master Volume setting affects certain cutscenes 10x more than it should. It doesn't seem to be all cutscenes. When the issue occurs, you hear the first half-second of audio, and then the rest of the audio is signifcantly reduced in volume. With Master at 15%, still able to hear the game, you can't hear anything in the problematic cutscenes. If you increase volume to ~45% you can then faintly hear the cutscene, but it is much quieter than it should be. Other volumes are at 100%.

Cutscenes that seem affected include:

Sophons Intro

Sophons Victory

Ice Colonization

Horatio Intro

Cutscenes that did not seem affected:

Horatio Victory

Steps to reproduce:

Set master volume to 15%

Confirm that you can still hear the game

Start a new game as Sophons

Can't hear cutscene

Alternatively use the "Empire Chronicles" to play a Victory cutscene

Yup noticed that too. I think it's all cutscenes issue, not just those u mentioned. And i dunno about day 1 but couple patches ago it worked properly i think (not 100% sure).