Power Query: Expand Table Contents - Columns not showing in the expand options

I have a table I am trying to expand, however when the dialog box comes up with the list of columns I can expand it is not showing all the columns in the table. The columns are there (see attached images), but it does not show up in the expansion options. Does anyone know why this might be?

If I mannually enter the field it will expand it. Everytime I open the expand dialog it removes the fields(s) and I have to manually enter the code in the line to expand again.

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Missing Columns 01.PNG Missing Columns 02.PNG

Note: I am not able to share the file since it has financial and procurement specific information that is considered sensitive by our company. I would if could, but that is not an option.

I wish I could do that. Unfortunately, there are too many tables and queries to go through making up fake data. Shouldn't a table when you go to expand it show all the columns? (especially since I can hard code it in there as shown above and it expands that column of data) If not, what kinds of things prevent that column from showing up in the expand dialog box? Is there some way to refresh the expand dialog box list so it shows all the columns vs just some of them?