As title says, dynamic mesh disappears when the origin is not visible in the camera frame.
Posting so others will know how to fix.
The issue is that Local Bounds is 0. Scaling 0 by anything still results in zero.
If you’re making custom nodes for dynamic Mesh system, like I am, at the very end run a function with this line of code:
DynamicMeshComponent->NotifyMeshUpdated();
This updates the LocalBounds of the dynamic mesh.