After a patch in April 2021, something changed that made wall clips very inconsistent.

Thankfully, there is a way to downpatch the game to a version that has much easier and more cooperative wall clips.

To access this version, do the following steps:

1. Right-click Manifold Garden in your Steam library and click "Properties"

2. Go to Betas and select "14704 - Speedrunning Branch" in the drop-down menu, and let it update to include the needed files

Happy clipping and flipping!