NavMeshAgent.remainingDistance doesn't work with two NavMeshAgents in the scene.

According to the docs, "If the remaining distance is unknown then this will have a value of infinity." In the script I compare it with zero.

To reproduce:
1. Open the scene "TestNavMeshAgent" and run it.
2. See that one of the bears is destroyed on Start (randomly is destroyed Bear or Bear (1)).

If you disable one of the NavMeshAgents, everything works fine.

Reproducible with 5.4.0b10, 5.3.4f1, 5.2.4p1