I see the pattern you're saying now. As I add more months, which in turn adds more products, the white space below the last bar of any particular month grows. I always just thought the bars were only getting thinner but the white space actually grows as well. If I use the y axis label as a reference point for the "middle" of that month's set of bars, I can see that there is more and more white space above the "middle", meaning the overall range of bars for that month is being filled with more white spaces/"invisible" bars. It seems like a flaw in DOMO's visualization to handle a series this way, although I understand the logic behind it. A stacked bar doesn't represent the data the way I need so I may have to accept the white spaces for now unless there's a way to remove it.

That's a good idea and may be applicable to a few other cards I have. For this specific chart however, we need to display all individual product names for our clients and show them all three months of a particular quarter. If I were still using screenshots for presentations, I could view them one month at a time and take 3 screenshots, but now I'm using the DOMO PowerPoint plugin to directly export cards to specific slides on a presentation, so the final desired visualization has to be accomplished at the card level prior to export.