Explorer No. 7 drove "De Lu" to check out Isis purely out of boredom, after all, following intense work, the wear and tear on the robots near the Kuom Impact Crater was extremely rapid. Instead of waiting to become immobile junk, it was better to wander around aimlessly.
In fact, the space agency was very interested in the rovers manufactured by NACA, so this operation wasn't a spur-of-the-moment decision.
As for the behavior of Isis No. 1, it was limited to accompanying surveillance, incidentally capturing a large amount of precious footage of American lunar rovers in flight.
It was just tough on the JPL staff who almost thought it was an alien invasion and were thrown into disarray for quite a while.
This encounter took place 380,000 kilometers from Earth, and neither party disclosed any news to the public; only a few people knew about this amusing incident.
Of course, for some, it was not amusing at all.