ConvertTo-PnPPage IncludeVerticalColumns throws Index out of Range error

When trying to do a page modernization, ConvertTo-PnPPage throws an error when we specify IncludeVerticalColumn = true in the page layout mapping file. Header and Metadata tags have been removed from the sample below.

<PageLayout Name="SomePageLayout" AssociatedContentType="" PageLayoutTemplate="AutoDetect" IncludeVerticalColumn="true" PageHeader="Custom">
      <SectionEmphasis VerticalColumnEmphasis="Soft">
      </SectionEmphasis>
      <WebParts>
        <Field Name="PublishingPageContent" TargetWebPart="SharePointPnP.Modernization.WikiTextPart" Row="1" Column="1" Order="1">
          <Property Name="Text" Type="string" />
        </Field>
      </WebParts>
      <WebPartZones>
        <WebPartZone ZoneIndex="0" ZoneId="BottomZone" Row="1" Column="1" />
      </WebPartZones>
</PageLayout>

Error Message:

Command Run:

ConvertTo-PnPPage -RemoveEmptySectionsAndColumns:$false -Identity $page.FieldValues.FileLeafRef   -TargetWebUrl $targetUrl -CopyPageMetadata -PageLayoutMapping "$($folderLocation)\$($mappingName)"   -PublishingPage -ErrorAction Stop 

Expected Outcome:
The page modernization works and adds a blank vertical column to the page.