The cookie is set to expire every 3 months (Feb, May, Aug, Nov). It's perhaps a bit wonky.

Thanks for following up with the info!
I did some investigation into this - the cache should be limited to 2 minutes, but I think it might've been overridden, and empty sets could be cached for up to 20 minutes.
I've adjusted it to 2-5 minutes, which should be closer to what you're looking for, though it's worth noting that the result would've still appeared much later than a few minutes past 15:01:

- that entry was added to the DB at 15:08:02 (15:01 is when it was submitted to Nyaa)
- the episode ID was assigned at 15:10:03 (required because your query includes eid=)
- the subsequent search index update was performed at 15:15:02 (required because your query includes q=)

So with the update, hopefully searches after 15:20 or so would've returned your desired result.

ETag isn't interpreted or used.

OK, and?

It seems tha AT theme cookie has an expired session, 30 days i think. The theme changes back to default (latest theme/sakamoto)