rolling up leaves

Can anyone help !! I have a couple of marantas both were a division from my late mother in laws plant, Both have had the same treatment compost etc but one of them the leaves have rolled up and I cant find a reason for this, Knocked it out of its pot and roots look fine have looked for pests but no to be found this includes unrolling the leaves , could it be fungal

 

The only thing I can suggest is they are known for rolling up there leaves up when they are desperate for a drink , are they in the same position in the house or different parts where one could dry out quicker ? draught ?etc I would mist the plant and dont over water this time of year , but thinking about it as I had a couple years ago I had to keep it slightly damp over the winter more so than other house plants I kept.

Spruce

 

I don't think it's fungal. I have one myself so getting back to basics......this plant grows naturally on the ground of tropical forests, that suggests to me it thrives in a warm, damp, sunless area. My own plant doesn't see sunlight at all and is in a slightly cooler room in my house. I also keep the soil damp all year round and feel that it's a thirsty plant as the leaves droop when it starts to dry out.

Perhaps this may be of some help Stumorphmac.

 

I thought this thread was about something completely different.

Yes, they do this, I've got one doing it, water it and they relax!