I have been growing Heli for about 15 years now.
But this year for the first time I have had a number of younger plants suddenly die from rot!
The pitchers suddenly shrivel and the base of the growing point where it is attached to the lower root stem is brown and rotten. But the rest of the stem below that point and the roots themselves are not rotten. So the problem is in the middle of the plant as it were.
The compost is a mixture of LFS and Seramis and has good drainage. I water the plants from above like my neps. And they are in the highland neps house.