An update for anyone else experiencing this issue...
My charts have multiple dimensions and I found that if "Show legend" is not checked the dimension ordered first (highest promotion) then any dimension under that dimension will also not have a legend (even if "show legend" is checked on that dimension) in the server environment.
While it is great to see the labels now when I'm in the server environment, I would love for the legend for the first dimension to not appear. Does anyone know how to do this? I've tried to limit its characters but unfortunately can only limit down to 1 and not 0. I've tried changing it's font properties from the "Axes" tab but unfortunately that also changes the properties on the labels that I want to keep. Lastly, I tried changing the text color from the dimension tab using an RGB() expression but this has strangely had no effect (see picture).
Is there anything else that I could try to remove this legend (without unchecking the "Show Legend" box)?