I have 3 Pindo palms all getting the same amount of sun and water. One has yellowing fronds and the new fronds have stopped growing half way out of the center of the tree. The other 2 are thriving but the 1 (which is a replacement) seems to be fading.
My Pindo Palm Is Struggling
Certified GKH Gardening Expert
Though you say they are receiving the same amount of water, watering sufficiently is where I would start.
If one of the plants has recently been replaced, it may require more water to become established.
Here is a link about Pindo Palm care.