If at any time in the vehicle’s life, different greases were used in the same cavity, they’ll most likely separate into liquids once they mix. Basically turn into oil.I cannot imagine that the grease is separating in there
Never mix dissimilar grease. The knuckle cavity is a very large space. Once different grease gets mixef in there- you’re basically toast. It’ll all turn into water.
Only way to set things right is to disassemble and clean out all old grease completely with solvent.