A wide variety of insects in midsummer can chew petals (and foliage), which include many species of beetles, grasshoppers, crickets, katydids, earwigs, and caterpillars
Often growing in rocky ground with acidic soil in the wild, this species doesn’t go summer-dormant the way the popular non-native bleeding-hearts do, but heat may hamper growth and pause...
I recommend shying away from garden clean-up regardless of timing because of the benefits that retaining leaf litter and other plant debris provides for wildlife.
Make sure any plant debris is removed from the bed at the end of the season, so the adult beetles have less shelter for overwintering. They may hide in leaf...
Ruderal species tend to be short-lived. In the wild, ruderals germinate from the seed bank when conditions favor them and their colonization of a habitat that suddenly has less competition.