Mesh Generation - No trigger on probe after full movement

On my new build, I'm getting a "No trigger on probe after full movement" during mesh bed calibration. The first assumption is that the probe isn't working at all, but it homes just fine. The sequence of events is as follows:
1. Home printer (g28)
2. Start mesh generation (BED_MESH_CALIBRATE PROFILE="default")
3. Printer moves to the bottom left probing point, bed moves to about where I would expect it to stop ~5mm from the sensor, then gives the error.

The print head does not crash, it seems like the probe triggers and then it gives up and throws the error.

Big video shows the homing working fine. The top right video is the bed mesh attempt: https://youtu.be/317IEv7uWno

I'm wondering if anyone has any good troubleshooting options and I would appreciate any advice.
YouTubeMSO
no mesg
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