fheroes2 is still in an active development so we expect a lot of bugs to be found. The main list of bugs is located at GitHub. We highly appreciate if an issue for the found bug will be created on GitHub as it's a direct source of development and any issues must be there so that developers know what to fix. While you're creating an issue please add as detailed as possible description with screenshots and/or save files.
Otherwise you could leave a post here or contact sirDranik to verify if the bug exists and he can help you with your issue.