I was using it in the same since as Jan and Rob I believe. . It burns out because it overproduces flowers and has no energy left for increases.
I had it happen on a 1st season rhizome that looked too small to flower, yet it put out a big bloom. The two I have now that I think may burn out bloomed heavy last year and are trying to bloom again. There is all of one plant in each case.
So yes in the future I should maybe say "burn~out" cause my Rhizomes in these cases are underground and not twisted.
