https://pastebin.com/4S2JuTUb

extremeSoundMuffler-2.0.3_Forge-1.16.1.jar
forge-1.16.1-32.0.108

did you have the lava sound muted? if so, was muted with an anchor or with the default method?

Player said he didn't use the mod at all. Although my quick look at the code seemed to suggest otherwise.

can you ask him if the game crashed while world was loading?