Terrain heightmap loses precision on Android and iOS when the heightmap texture is blitted to a RenderTexture using the default Blit shader

Reproduction steps:
1. Open the attached “IN-125345“ project
2. Switch to the iOS or Android Build Platform
3. Run the included play-mode test using the Test Runner
4. Observe the test result

Expected result: The test passes as the texture does not lose precision
Actual result: The texture loses precision and the test fails

Reproducible with: 2023.1.0a15, 6000.0.63f1, 6000.2.14f1, 6000.3.0f1, 6000.4.0a4, 6000.5.0a2

Reproducible on: macOS 15.6.1 (by reporter), 26.1
Not reproducible on: No other environments tested