I have mine between Hostas and Ferns mostly. Up here, the hostas and ferns leaf out fairly late in the Spring and can take over from the Bleeding Hearts quite nicely. For me, right now in the garden, Bleeding Hearts are in full bloom and hostas/ferns have popped out of the ground but have yet to completely unfurl and stretch out. The timing is almost perfect :) Here is a link that might be useful: Mad Dogs and Englishmen

babelsrus, is this different than how this plant behaves most years? You said tomato next to it, which leads me to believe its in quite a bit of sun... Typically dicentra will go dormant after blooming, in summer with the heat - have you had an unusually warm stretch of weather, know it's been in the upper 80's consistently near my nieces home in Durham NC. I'd find early June a bit early for summer dormancy here, but we've had no heat that would count...I can usually plan on mine being gone (that's for the season, not permanently gone) by late July in this cool summer Z8. I don't think I'd spray, but would clean up any leaves or stems if it completely yellows and dies back.

It looks like what is generically called "leaf stress disorder" where a plant may become stressed from sudden changes in light, temperature, or water, and this may cause its new leaves to emerge ill-formed. Once the environmental conditions stabilize, the later leaves develop and unfurl normally.

It depends on how far advanced coming up your plant was. The plant should send up new shoots in a while. Replant for now. When I did something similar only a few shoots came up in July but by the next year it was fine. You might go ahead and post the picture.