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Spreadsheet with 2 RangeDirective locks up filter

I have a spreadsheet component with a RangeDirective for the headers and one for the data.

When applying a filter the browser freezes up.

Debugging it looks like the updateDatasource gets a null object and doesn't handle it.

Attaching screenshots because I can't seem to cut and paste code in here ( especially with <> ).


If I remove the first rangedirective it works, but then I don't get my headers. I can't use showFieldAsHeader as I need a bit more control and the data is just arrays. Not sure if I need to merge them together etc. I'll keep reading the docs, but probably shouldn't freeze up the browser.