How to reproduce:
1. Open the user's attached "Scene manager.zip" project
2. Open the "Bootstrap" Scene
3. Open the Profiler (Window->Analysis->Profiler)
4. make sure Memory Module is enabled (Profiler top-right->Profiler Modules->Check Memory)
5. Enter the Play Mode
6. Press "Load scenes" then "Unload scenes"
7. Pause the Play Mode
8. In the Profiler take Memory Sample Playmode (Select Memory module->"Take Sample Playmode")
9. Take note of "Scene Memory"
10. Load and unload Scenes multiple times
11. Take another Memory Sample Playmode

Expected results: The Memory of "Scene Memory" is the same as after the first Scene load/unload
Actual results: The Memory of "Scene Memory" has increased after each load/unload of the Scenes

Reproducible with: 1.1.5 (2019.4.36f1, 2020.3.30f1), 1.19.18 (2019.4.36f1, 2020.3.30f1, 2021.2.15f1, 2022.1.0b11, 2022.2.0a7)