How to reproduce:
1. Create and open a new project
2. Navigate to Project Settings, Player tab (Edit > Project Settings > Player)
3. In the Android tab, under Resolution and Presentation, disable “Status Bars” and “Navigation Bars”
4. Set System Bars Behavior to “Show Transient Bars By Swipe”
5. Under Other Settings, make sure Application Entry Point is set to GameActivity
6. Build and Run the project for Android
7. When the application starts, swipe to bring out the Navigation bar
8. Wait for ~5 seconds
9. Observe the device

Actual result: The navigation bar remains visible, without transparency and does not hide automatically
Expected result: The navigation bar hides automatically and is transparent while shown

Reproducible on: 6000.7.0b3, 7000.0.0a5
Not reproducible on: 6000.0.82f1, 6000.3.22f1, 6000.6.5f1
Fixed in: 6000.6.5f1

Built on: macOS 26.5.2 (M1 Pro)

Reproducible on devices:
VLNQA00118 - Google Pixel 2 XL (Pixel 2 XL) - CPU: Snapdragon 835 MSM8998, GPU: Adreno 540, OS: 11
VLNQA00294 - OPPO Reno Z (PCDM10) - CPU: Mediatek MT6779 Helio P90, GPU: PowerVR Rogue GM9446, OS: 11
VLNQA00334 - Xiaomi Mi A3 (Mi A3) - CPU: Snapdragon 665 SM6125, GPU: Adreno 610, OS: 11
VLNQA00617 - Xiaomi Redmi Note 11S (2201117SY) - CPU: MediaTek Helio G96 (MT6781), GPU: Mali-G57 MC2, OS: 11

Not reproducible on devices:
VLNQA00344 - Note20 Ultra 5G USA (SM-N986W) - CPU: Snapdragon 865 SM8250, GPU: Adreno 650, OS: 11
VLNQA00627 - Google Pixel 8 (Pixel 8) - CPU: Google Tensor G3 (GS301), GPU: Mali-G715, OS: 15
VLNQA00663 - Samsung Galaxy S26 Ultra (SM-S948B) - CPU: Snapdragon 8 Elite Gen 5 (SM8850), GPU: Adreno 840, OS: 16
VLNQA00567 - Xiaomi Redmi Note 8 Pro (Redmi Note 8 Pro) - CPU: MediaTek Helios G90T MT6785T, GPU: Mali-G76 MC4, OS: 9
VLNQA00472 - Samsung Galaxy A52 (SM-A525F) - CPU: Snapdragon 720G (SM7125), GPU: Adreno 618, OS: 12

Notes:

Status bar does not exhibit this behavior, only the navigation bar
Appears to affect projects initially setup in such way, changing behavior at runtime does not appear to reproduce this issue