Cardiocrinum 'giganteum' - leaf browning

I am hoping that someone can give me advice on how to treat my cardiocrinum.
I have notices with a couple of the Lilies, that the leaves turned brown (not a dry brown, dark and moist). The one in particular, I took all the leaves off of it and cut the stems off and put in garbage. The one that I cut back is not in full sun. It has
grown very well over the years. Wondering if our damp and cool spring has alot to do with this.
My cardiocrinum produced beautiful leaves, but started to show signs of browning on parts of the leaves. Not sure if I should leave on the plant or if I should cut them off.
There are a couple of leaves that do not seem to be affected.
Any thoughts or ideas would be welcomed.

 

Yes, probably a bacterial problem related to the recent weather conditions. Many other kinds of plants are showing problems now that would have been increased by the spring we had.