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Changes between Initial Version and Version 1 of Ticket #56198, comment 9

-                      initial
+                      v1
+I haven't dug into these, but 5 tests are now failing because they are using non-empty strings as cache keys. Likely issues in core.
+tests were failing because they are using non-empty strings as cache keys.
+This was an issue with `update_user_caches()` and `clean_user_cache()`, I've fixed this in https://github.com/WordPress/wordpress-develop/pull/2967/commits/c8f38c97b1f88263bf7249ad2d3bdabac18d60e7
+This is likely causing issues right now and should be fixed in the next patch release.
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