Nodata output when aggregating raster

[pwc]

ArcGIS pro 2.8.0
Hi!

I'm simply trying to aggregate my data. The output contains nodata cells and I don't understand why.
I am aware of the "Ignore NoData in calculations" setting. Attached image shows underlying input data(colored) and the aggregated output (black/white).

Any ideas or suggestions?

Tia!

[DanPatterson]

What tool settings were you using? 

What type of aggregation etc

And the legend for the layer, you indicate is black and white, is it nodata and 1 or something else?

How Aggregate works—ArcGIS Pro | Documentation

Aggregate (Spatial Analyst)—ArcGIS Pro | Documentation