bug: search adds default select values even when they're explicitly removed

Using hyperdx through clickhouse cloud. Looks like version 2.7.1.

See search below. query removed select values and they were added back in

<img width="3076" height="1444" alt="Image" src="https://github.com/user-attachments/assets/222b4723-964a-4110-bc63-e4bc7986946f" />