did your bleeding hearts bloom any? sometimes in warm climates or if soil is dry,
plants will go dormant after bloom. if your soil is dry top dress it with well rotted manure to maintain soil fertility.
or have you ever divided it?
plants could loose vigor if overcrowed. lift in fall or as they go dormant, divide clumps and replant in soil that has been enriched with organic matter.
bleeding hearts are not known for any serious pests or diseases.

i just got my bleeding hearts this year so im still learning about them, hope this helps some. i also just got butterfly bushes this
spring ,i dont know anything about...yet! only once did the leaves turn, & that was due to frost. good luck

sibyl