Portfolio Today's Gain calculation is wrong

I found a bug in how "Today's % Gain" is calculated in my portfolio holdings. I noticed that this value is basically calculated as (today's gain) / Value. It should instead be (today's gain) / (Value - today's gain).

I wouldn't have noticed this had I not had some big moves in my portfolio yesterday. For example, if a stock moves down 33% in a day, this will appear as a -50% loss. That is, if the stock is down from $9 yesterday to $6 today, the current formula will calculate (-3) / 6 = -50%, whereas the correct formula is (-3) / (6 + 3) = -33%.