"Perennials" seems as good a place as any to discuss hostas; don't worry about that.
Information helpful to other members would be:
--Knowing where you live (please give an idea in your profile; that way it shows up without you having to write it in each post. You don't need to be as specific as I am; something like "central Wyoming" or "western Panhandle Florida" is fine).
--What the weather has been like, both generally this season and recently, for these hostas.
--What kind of sun/shade situation they live in.
--What kind of soil they live in.
--The photos seem to show that the hostas live in the ground as opposed to living in containers; is this correct?
--And anything else you can think of that may have been different this year versus previous years: different watering schedule? different nutritional source(s) for the plants? have you been ill/away and had to rely on others to take care of the plants? have unfamiliar insects been observed elsewhere in your yard? Just whatever observations you may have made that could bear on the health of these otherwise beautiful plants.
Best wishes for some good advice! I unfortunately have no experience with hostas, but I do know that the above information may bring some hypotheses to mind and will help others figure things out. The photos are a big help, too; thank you!
Sunset Zone 17, USDA Zone 9