I implemented a “restock” mechanic by using the search-catalog-items operation to return the matching item, using text_filter to match. Without warning, it stopped working a couple days ago.
I was using version 2024-07-17. Now it returns the first Square item we have in our items dashboard instead of the item that matches the text_filter.
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What’s your application ID and what’s a request that was previously working that now no longer works? 
Actually, the issue seems to be resolved now. I checked and it ran correctly an hour and a half ago. It seems to have been broken between Saturday and Monday.
Now it does appear to be correctly matching the item with the text_filter condition.