This is expected behaviour. If you want to preserve some fields in the collections, make sure you use an Array Aggregator instead.
Use the right aggregator for the job:
- A Text Aggregator reduces everything to just a single Text variable.
- An Array Aggregator adds each item to an Array, which can hold multiple items.
Combining Bundles Using Aggregators
Every result (item/record) from trigger/iterator/list/search/match modules will output a bundle. This can result in multiple bundles, which then trigger multiple operations in future modules (one operation per bundle). To “combine” multiple bundles into a single variable, you’ll need to use an aggregator of some sort.
Aggregators are modules that accumulate multiple bundles into one single bundle. An example of a commonly-used aggregator module is the Array aggregator module. The next popular aggregator is the Text Aggregator which is very flexible and can apply to many use-cases like building of JSON, CSV, HTML.
You can find out more about the other types of aggregator modules here:
- Array aggregator
- Text aggregator
- Numeric aggregator
- Table aggregator
- JSON aggregator
- CSV aggregator
- Archive (ZIP) aggregator
- other app-specific aggregators
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Investing some effort into the Make Academy will save you lots of time and frustration using Make.