I don't think I'm able to tell what the problem is without FTP access. I see there are term and custom field filters as well, where a little misconfiguration can cause problems. All in all it adds up to a very complex query which I can only debug with file access.
There is also a chance of a yet unknown bug, but I will be able to tell once I get to debug the search 🙂
You can add temporary FTP access if you edit the first post in this thread, or upload it in a .txt file. Both methods are safe, and only visible to me and you.Best,
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