This was working previously, for years even. Came back to check on it and saw the 2nd screenshot below. So I went to fix it and there's nothing to be fixed according to the configure screen. Would rather not have to rebuild.
Here it is in configure view
Here it is in layout view
I'm having a similar issue. This was working previously. See the screenshots below.
In the live version there are a couple of duplicate categories, even though this is built using a field that uses domains. Two of the categories are showing as the "All other series" color (grey) but labeled the exact same as with the correct color (Construction Planned/In-Process and Survey Planned/In-Process). So, I went into check this out and edit the Dashboard (but before I click "Configure" the chart). There, the chart looks completely different. After I start configuring the chart, it looks the same as the live view. Also while testing different things out (e.g. removing chart and re-adding), sometimes all three charts looked completely different.
Live view:
Dashboard Edit view:
Configure view: