Vulkan Mobile: Clip Children shows a copy of all nodes in the scene

[Insane-Owl]

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Bugsquad note: This issue has been confirmed several times already. No need to confirm it further.

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Godot version

4.0.2.stable

System information

Windows 11, AMD RX 6700 XT (23.4.1), Mobile renderer

Issue description

sprites with clip_children - 'Clip Only' enabled, have a shrunk-down mirror of the scene behind them.

This only happens in the Mobile renderer

Steps to reproduce

1. Create a background, e.g. a sprite
2. Add a sprite with clip_children enabled
3. Add another sprite as a child of the one with clip_children enabled, and scale it down or turn down its transparency
4. The background sprite will appear behind it (may require moving it)

Minimal reproduction project

Clip Children Bug.zip

[clayjohn]

For some reason the entire background is copied into a rect the size of the Parent.

The issue is likely comes from here:

godot/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp

Lines 3290 to 3294 in ab7cb2a

	if (RendererSceneRenderRD::get_singleton()->_render_buffers_can_be_storage()) {
	copy_effects->copy_to_rect(rt->color, rt->backbuffer_mipmap0, region, false, false, false, true, true);
	} else {
	copy_effects->copy_to_fb_rect(rt->color, rt->backbuffer_fb, region, false, false, false, false, RID(), false, true);
	}

[AndyAstrand]

I can also report this is happening for me in the editor, and in the emulator, and on Android using gl_compatibility mode.
https://youtu.be/usgMUOv_7EI

[Insane-Owl]

Can confirm problem still exists in Godot 4.1.stable

[endritdev1]

Still happening :/

[vyshliy]

Confirmed in 4.2 rc2

[denq04]

Confirmed in v4.2.stable.mono.official [46dc277]

[htmiel]

Any news on this? I'm trying to use a Polygon2D as a mask with Clip Children, and I have the same behavior on the Mobile renderer. (Godot 4.2.1 / Win10)