The collision DI input is a hidden input, but is necessary for compilation. The input node should likely be marked as required, not hidden.
RESULT
The compile fails with this error:
Data interface used by custom hlsl, but not found in precompiled data. Please notify Niagara team of bug. - Node: Sphere Trace Distance Field GPU - Fountain, Particle Spawn Script Interpolated, ScratchModule SphereTraceDistanceField_GPU
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-113468 in the post.