Export Features returns null values for all data in the attribute table

Question

I have a large amount of data for several cities. This is hosted online.

Each month I want to separate out the individual cities and append their data to their own hosted feature layer.

I made a model in modelbuilder to do that. What it does is Select Features by Attribute (selects a City), then Export Features, then Add Global IDs to those exported features, then Append those exported features to the cities layer.

However, some of the time the model doesn't export all of the data and just returns null values instead. For a city with 33 points of data, for example, it only kept the data for three of those points. I can't seem to figure out why it maintained the data for those three and cleared the attribute table for the other thirty.

What's even more irritating is that the same model works completely fine some of the time.

JulianMcCoy · Accepted Answer

Figured out the issue (maybe), because I added the hosted feature layer to my map on 2/13, although the attribute table for the feature layer got updated and therefore showed the correct data, export features was only exporting the features that were present at the time that I added the layer to the map, regardless of the data that the attribute table was showing.