Using advance() has no effect on Discrete animation tracks and stops playback

[KoBeWi]

Godot version

4.2 1ba920f

System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

Issue description

func _ready() -> void:
	$AnimationPlayer.play("new_animation")
	$AnimationPlayer.advance(0)

The animation has a single track with Update Mode set to discrete. It does not play, no matter the argument used.
Removing advance() will make it play.

Works correctly in rc1.

Steps to reproduce

1. Run MRP on master
2. Run MRP in 4.2 rc1

Minimal reproduction project

brokedvance.zip