Mesh flickers in portrait when Box Projection and Use Rendering Layers are enabled on Vulkan API with specific geometry in scene

How to reproduce:
1. Open the attached “IN-147106” project
2. Delete all URP assets (VolumeProfile, GlobalSettings, URP Asset, URP AssetRenderer)
3. Create new URP Asset and AssetRenderer (Create > Rendering > URP Asset (with Universal Renderer))
4. Select URP Asset
5. In the Inspector, under Lighting, enable Box Projection and User Rendering Layers
6. In the Project Settings, assign the URP assets in Graphics and Quality tabs
6. Build and Run for Android
7. Observe the scene on the device

Actual result: The plane mesh occasionally flickers
Expected result: No flickering is observed

Reproducible with: 6000.3.0a3, 6000.3.21f1, 6000.5.6f1, 6000.6.0b6, 6000.7.0a1
Not reproducible with: 6000.0.80f1, 6000.3.0a2, 6000.7.0a3
Fixed in: 6000.7.0a2

Built on: macOS 26.5.2 (M1 Pro)

Reproducible on device(s):
VLNQA00470 - Samsung Galaxy S8 (SM-G950F), CPU: Exynos 9 Octa 8895, GPU: Mali-G71, OS: 8.0.0

Not reproducible on device(s):
VLNQA00663 - Samsung Galaxy S26 Ultra (SM-S948B), CPU: Snapdragon 8 Elite Gen 5 (SM8850), GPU: Adreno 840, OS: 16
VLNQA00627 - Google Pixel 8 (Pixel 8), CPU: Google Tensor G3 (GS301), GPU: Mali-G715, OS: 15
VLNQA00567 - Xiaomi Redmi Note 8 Pro (Redmi Note 8 Pro), CPU: MediaTek Helios G90T MT6785T, GPU: Mali-G76 MC4, OS: 9
VLNQA00531 - OnePlus 11 5G (CPH2449), CPU: Snapdragon 8 Gen 2 (SM8550), GPU: Adreno 740, OS: 13
VLNQA00512 - Samsung Galaxy S9 (SM-G960F), CPU: Exynos 9 (9810), GPU: Mali-G72, OS: 10
VLNQA00472 - Samsung Galaxy A52 (SM-A525F), CPU: Snapdragon 720G (SM7125), GPU: Adreno 618, OS: 12
VLNQA00134 - Samsung Galaxy S8 (SM-G950F), CPU: Exynos 9 Octa 8895, GPU: Mali-G71, OS: 9
VLNQA00548 - HUAWEI P10 (VTR-L09), CPU: HiSilicon Kirin 960, GPU: Mali-G71, OS: 9
VLNQA00128 - Samsung Galaxy Note 8 (SM-N950F), CPU: Exynos 9 Octa 8895, GPU: Mali-G71, OS: 9
VLNQA00177 - Xiaomi Mi Note 2 (Mi Note 2), CPU: Snapdragon 820 MSM8996, GPU: Adreno 530, OS: 8.0.0
VLNQA00224 - Samsung Galaxy A5 (2017) (SM-A520F), CPU: Exynos 7 Octa 7880, GPU: Mali-T830, OS: 8.0.0
VLNQA00545 - Samsung Galaxy On7 Prime (SM-G611F), CPU: Exynos 7 Octa 7870, GPU: Mali-T830, OS: 8.0.0

Notes:

• URP assets deletion can be avoided if the assets were created on reproducible version of the Editor, if they are created on a not reproducible version the issue will not reproduce
• Disabling/removing parts of the geometry yields inconsistent results (sometimes the issue will stop reproducing when the same object is toggled on/off), current setup appears to provide results consistently
• Does not reproduce when the device is rotated to landscape