Thank you for the test project files. I am able to reproduce the memory leak problem using your project on Windows.
After some experiments, I find that I can reduce the project by removing all but the Corners and SPR filters:
If I remove either of those, the problem does not occur. So there must be some interaction between the two filters. This is an important clue.
Hopefully this report is related to this other report that I was never able to solve:
