The last Calibre beta had a bug that caused crashes when renaming saved searches. There were some changes made in 5.4.x to fix that, but I'm not sure if any of them affected the caches.
I think there was also a recent change to allow templates in saved searches, which I imagine would affect the caches.
Last edited by ownedbycats; 11-02-2020 at 01:40 PM.
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