How to reproduce:
1. Open users’ attached “vramtest.zip” project
2. Open Scene “SampleScene”
3. Open the Profiler window (Window -> Analysis -> Profiler)
4. Change the Profiler Modules so that only the ‘Rendering' Module is displayed
5. In the Hierarchy select GameObject “Cube” and in the Inspector enable the “Updategimaterials” script
6. Enter the Play Mode and observe RenderTextures memory usage in the Profiler

Expected results: RenderTextures memory stays constant
Actual results: RenderTextures memory keeps constantly increasing

Reproducible with: 2019.4.29f1, 2020.2.0a2
Not reproducible with: 2019.4.30f1, 2020.2.0a3, 2020.3.16f1, 2021.1.16f1, 2021.2.0b7, 2022.1.0a5

Notes:
- To observe expected results repeat steps 5-6 with the “Updategimaterials” script disabled.