Typically bugs should go on an individual card. Yes, that will create many cards, but if they're small, then they'll be fixed quickly. This is more of an art

Typically bugs should go on an individual card. Yes, that will create many cards, but if they're small, then they'll be fixed quickly. This is more of an art than a science, experiment with different approaches, read about how others are doing things and modify to match your own process.