Droopy leaf

Not all plants are the same. Some have stronger root systems and take up nutrients a bit better then their peers. Think of it like tomatoes, some of them have disease resistance from the root stock its grafted to. They use the roots of one tomato as its better at fending off disease but the fruiting stalks of another variety as they taste/perform better, so best of both worlds. Maybe the plant does not do well in clay and sand soils. and it would be better off in a soil rich in compost and humates. Easyist thing you can do if give it love and hope it bounces back. might just take some time. It does not look like the worst thing ever, I have seen much worse off plants make a recovery. Or transplant it in to a better medium, but that be a lot of extra stress. Good Luck!