Same thing happened here with losses from crown rot. I lost Scandinavia
I also lost a 4 year old seedling that was going to be named and registered. It had 25 or more bud stalks this year and I noticed in August some of them started looking bad. The plant was in a low spot where it stayed too wet. I dug it and tried to save some of it. It was 40 or 50 fans but all died. I also lost another seedling that I was going to register after I moved it from the place it grew for 3 years. This one rebloomed all summer and I set a few pods on it. It was unique and I don't have anything else like it.
This was going to be a 2016 or 17 intro but looks like it is gone.