Rising Flames Heart Bug
Lady of Shalott
Hearts in Ember Bay are repeatable. Thus, they reset each day at reset. There’s a thread in GD addressing these repeatable Hearts and Map Completion. There’s also the Release Notes found in the Game Release Notes sub-forum, as well as the Releases page, and the Wiki, accessed via the link(s) above. All have more information about repeatable Hearts.
Good luck.
Or in case you’re referring to the inability to progress a heart, Ive seen especially at the jade fortress the hearts dont properly reset and prevent making any form of progress in it for that day until it resets again.