Upon unlocking the final boss arena, and driving into the lift toward the claw sequence, I spun Laika wrong and died at the exact moment the claw tried to grab me by spinning into the wall. This broke the event when trying to ascend in the opposite lift, removed the sound of guns and the motorbike during all subsequent gameplay, and broke the camera during the final boss' dialogue. The camera moves to show Laika hovering in empty space occasionally during the sequence. The boss battle plays out normally, except for the lack of sound. The sequence when you drive into the trapdoor the bomb is dropped through was broken after dying on the platform [by rolling over], causing Laika to fall repeatedly under the final event trigger into empty space. Managed to reactivate the event by dashing upward into the trigger upon reset.
Reloading the save file did not fix the issue, and the motorbike/gun sounds are still missing in the rest of the game, even after teleporting to different areas/going to sleep etc.