I agree that the new behavior is frustrating. I was using one of the bars to display Temporary Hit Points (THP) in D&D 5e and setting the values as [blank]/0 when the character had no THP so that the bar would not show up, since characters do not have THP more often than they do. When a character gained THP, the values would be set to X/0 to show the number X on the bar for reference. Since there's no maximum value to THP it didn't need to show a current/maximum like normal hit points. Now, setting a bar to X/0 will not display it and requires setting it to X/1, which is confusing to players as it appears as if there's a maximum amount of THP (1) and the bar says they're always over that limit. As a workaround I'm going to set the bars to [blank]/[character's max HP] just to have some kind of standardization, but it's technically inaccurate according to the game rules.