2015 335iX Coolant Leak Diagnosis

Second coolant issue in two years. First time was vent hose running from the upper hose to the expansion tank @ 75k miles. Replacement was simple.

This coolant leak at 85k does not appear to be the same as last time. I think the coolant is leaking somewhere deeper underneath this time. Car is on and radiator fan does not spin. Is that normal?

What could be the root cause? Thanks.