Pre-populate form using URL query

I'm trying to pre-populate dates from a schedule to an inspector request form, but only the first field (Start Date) is populating, the End Date is not. Here is my code with URL xxxx out.

="https://app.smartsheet.com/b/form/d485bfc4cbfc471882eb77ed6042ace9?Start%20Date=" + [Start Date]@row + "&End%20Date=" + [End Date]@row

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