Is This HVX?
It's pretty obvious the leaf in the center of the photo has something going on. I don't know what it is but if it's HVX then it's probably wide-spread throughout the garden as I've had this montana Aureomarginata since 2001. This is the only leaf of the three divisions of this hosta that exhibited this leaf pattern.
My Wide Brim was recently diagnosed with HVX, and if this is also HVX I won't destroy the infected hostas but wait until all the vegetation for all the hostas has died for the season before I clean up the bed. I also won't be dividing hostas, buying new ones, or cutting scapes. In other words I ain't gonna mess with them. I'll fertilize, water, and mulch with compost but that's it.