Here's another possible clue:
Here's the text SQL query it generates:
SELECT
shop_id,
initial_utm_content, utm_content,
initial_utm_source, utm_source,
initial_utm_term, utm_term,
initial_utm_campaign, utm_campaign,
initial_utm_medium, utm_medium,
initial_referrer, referrer,
how_did_you_hear_about_archive,
where_did_you_hear_about_us
FROM
temp_shop_channels
WHERE
how_did_you_hear_about_archive LIKE 'Instagram';
Strangely, when I run the query without the transformer (literally pasting that directly in the retool query editor and running it), it works fine.