Reproduction steps:
1. Create a new project and Import Bolt/Visual Scripting
2. Enter Play Mode
3. Check the Editor log for "Unloading xx unused Assets to reduce memory usage. Loaded Objects now: xxxx."
4. Enter Play Mode
5. Check the Editor log for "Unloading xx unused Assets to reduce memory usage. Loaded Objects now: xxxx."

Expected result: the number of Loaded Objects remains the same
Actual result: the number of Loaded Objects increases incrementally

Reproduces on: Bolt 1.4.15 (2019.4.29f1, 2020.3.14f1), Visual Scripting 1.7.3 (2021.1.14f1, 2021.2.0b3, 2022.1.0a2)

Notes:
-Issue only reproduces when Bolt/Visual Scripting package is installed
-Issue still reproduces on Visual Scripting 1.7.3 but less noticeably, Loaded Objects increase by a small amount (about 5 objects per Play Mode) compared to Bolt 1.4.15 (about 60 objects per Play Mode)
-Issue eventually leads to "Resource ID out of range" error