Some sounds are a little lagging, e.g., step sounds, jumping sounds.
I know it is not a big problem, but it kind of affects the experience.

MC: 1.12.2
Forge: 14.23.5.2860
Mod: 3.6.3
OS: Windows 10
Java: MC default

The sound remapping occurs at the time the client receives the sound play request from the server. All sounds, regardless of remap, would be slightly delayed if that is your experience. Are you running stand alone or on a server?

The sound remapping occurs at the time the client receives the sound play request from the server. All sounds, regardless of remap, would be slightly delayed if that is your experience. Are you running stand alone or on a server?

Yes, all sounds are slightly delayed (but footstep and jumping sounds are mostly subjectively obvious) on both the offline and server game, comparing to the default sounds.