@Rachel Cunningham​ :

One possible reason for this issue could be a data type mismatch between the bronze and silver tables. It is possible that the column in the bronze table has a non-null value, but the data type of that column is different from the data type of the corresponding column in the silver table, which could result in a NULL value when the data is loaded into the silver table.

You can check the data types of the columns in both the bronze and silver tables using the

printSchema() method. Also, you may want to check if there are any transformations or modifications applied to the data between the bronze and silver tables that could cause this issue.