Thanks for sharing this! I’ve had this issue sporadically since last June. Seems to clear the sfx sometimes, but other times it gets stuck in a loop forever.
We’ve also had this bug in our current project. Our workaround, which is very specific to our island, was to ensure the player landed on something before dying. So we have an invisible ground collider, and as long as the player landed on it before dying, the sliding/falling SFX would stop after respawning.