layer.materialize() function not copying all features within layer

Question

What could cause the layer.materialize() function to not copy all the features within a layer?

Similar Post: layer.materialize() does not copy all features

Steps to reproduce:

1. Drag an s57 file in qgis to load the layers contained within

2. Choose one layer and convert it to a geopackage file (I chose the "LIGHTS" layer. Further experimenting revealed that this issue does not occur with some layers)

3. Remove all layers except the geopackage layer created in step 2

4. Execute the following code to try to create a memory layer from the geopackage layer chosen in step 2:

for curLayer in QgsProject.instance().mapLayers().values():
    request = QgsFeatureRequest().setFilterFids(curLayer.allFeatureIds())
    print(request.filterFids())
    clone = curLayer.materialize(request)
    print(clone)
    QgsProject.instance().addMapLayer(clone)

Result: A cloned layer with all the attributes but none of the features.

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Upon further research I realized something of note:

After creating the geopackage layer in step 2, I deleted all columns (attributes) of the layer that contained null values for any features. After doing so, I got a memory layer containing all features ids.