Hi Monk...I agree. Overwatering can cause a sad drooping plant. I was mostly considering the comment OP made about this happening after it's most recent feeding. So you think it may be chronic overwatering? Better picture would sure help...
JD
Both in the pic are exhibiting classic over nutrition, N specifically with the claw and burn.
The chronic overwatering you can see in the tacoing down, the decay, and the waffling bottom growth on the healthier plant.
Combined with the pots sitting directly in the ground, I'd say definitely overwatered, overfed, and some pissed off roots.
If it were me, I'd punch more drainage holes in those pots, the sides specifically, then flush to 20% runoff with a peroxide dilution. Keep them raised with a fan on the pots, and then a 1/4 strength feed 24hrs after the peroxide rinse. Thorough dry. That's just me though lol.