GANNT Block incorrectly charting dates

I have a table with a lookup field that populates start and ends dates that I want to use to use to plot items out on the new Gannt block. Similarly to the timeline block, it looks like you can’t use lookup date fields to plot items, so I created formula fields with ={start time} etc. That did the trick and I can now select these fields as start and end dates in the Gannt chart.

The problem is the Gannt block is NOT populating these dates correctly. It sets everything as a start and end date on January 1, 2019. Does anyone have a fix for this?

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Figured out that the GANNT block works using a rollup instead of a linked record. Just select MIN(values) as the aggregation function.