Re: What stops a plant...
I suggest to repot to a bigger pot with new soil or put in the ground. The top leaf is showing cirrhosis while the center leafs appear healthy.
From the picture that appears to be a pup from the side of a main corm. What ever is effecting the main corm (likely rot) is now attaching the pup. So inspection, cleaning and removing the pup from the main corm is needed. ...Good luck.
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