NetworkProximityChecker not working correctly on Client

I've tried using the NetworkProximityChecker class in my project and it works fine on the host. However, on the client side the objects get destroyed instantly and nothing else happens.

As I was trying to find out what the problem is I noticed the in the OnCheckObserver function it tried to find a PlayerController associated with the NetworkConnection passed into the function. This is however, always null.

Any ideas on how to fix this issue?