Notes on my Peace Lily

My peace lily has been acting weird lately—the leaves droop dramatically even when the soil feels moist, and I'm wondering if I'm overwatering despite trying to follow the "water when it droops" advice. Has anyone else found that Spathiphyllum can be fussy about water quality, or am I overthinking this? I've got four plants total and this one is definitely my most dramatic, which I kind of love, but I'd hate to lose it.