What is wrong with this Feb Gold?

Spring is late this year in the Pacific North West. 2-3 weeks later than usual. I’ve got a problem with a bunch of February Gold. It’s been in the ground for ~ 3 years. This year 1/2 of the blooms are deformed. See the attached pictures. The corona is short and not frilly and the petals is slender. Does anyone have any explanation? Fungus, disease?
Do I need to dig up and destroy before it spreads?