So I was farming and noticed that some tiles missed even though my current HP was more than the targets HP. This has to do with the interaction with Ranvir’s special giving me a chance to miss if HP is less than target HP and Heimdall’s special giving me boosted HP going over my max HP. You can see that the missed target has HP greater than max hp of the hero the tiles came from but less than the boosted HP.
Thank you for the report! We were able to reproduce this issue here and it will be fixed in the next update (version 29). I’ll mark this as a known issue.