bask43

I had the same experience
So I left debugging logs.

12:43:06 / Cookie detected: comment_author_e118a5144ffaddbfed4914cc1c278eea
12:43:06 / Cookie detected: comment_author_email_e118a5144ffaddbfed4914cc1c278eea
12:43:06 / Cookie detected: wordpress_test_cookie
12:43:06 / Cookie detected: wordpress_logged_in_e118a5144ffaddbfed4914cc1c278eea
12:43:06 / No wp-cache file exists. Must generate a new one.
12:43:06 / Cookie detected: comment_author_e118a5144ffaddbfed4914cc1c278eea
12:43:06 / Cookie detected: comment_author_email_e118a5144ffaddbfed4914cc1c278eea
12:43:06 / Cookie detected: wordpress_test_cookie
12:43:06 / Cookie detected: wordpress_logged_in_e118a5144ffaddbfed4914cc1c278eea
12:43:06 / In WP Cache Phase 2
21:43:06 / Setting up WordPress actions
21:43:06 / Created output buffer
21:43:06 / Cookie detected: comment_author_e118a5144ffaddbfed4914cc1c278eea
21:43:06 / Cookie detected: comment_author_email_e118a5144ffaddbfed4914cc1c278eea
21:43:06 / Cookie detected: wordpress_test_cookie
21:43:06 / Cookie detected: wordpress_logged_in_e118a5144ffaddbfed4914cc1c278eea
21:43:06 / scheduled wp_cache_gc for 10 seconds time.
21:43:10 / Output buffer callback
21:43:10 / Output buffer callback
12:43:10 /favicon.ico Cookie detected: comment_author_e118a5144ffaddbfed4914cc1c278eea
12:43:10 /favicon.ico Cookie detected: comment_author_email_e118a5144ffaddbfed4914cc1c278eea
12:43:10 /favicon.ico Cookie detected: wordpress_test_cookie
12:43:10 /favicon.ico Cookie detected: wordpress_logged_in_e118a5144ffaddbfed4914cc1c278eea
12:43:10 /favicon.ico No wp-cache file exists. Must generate a new one.
12:43:10 /favicon.ico Cookie detected: comment_author_e118a5144ffaddbfed4914cc1c278eea
12:43:10 /favicon.ico Cookie detected: comment_author_email_e118a5144ffaddbfed4914cc1c278eea
12:43:10 /favicon.ico Cookie detected: wordpress_test_cookie
12:43:10 /favicon.ico Cookie detected: wordpress_logged_in_e118a5144ffaddbfed4914cc1c278eea
12:43:10 /favicon.ico In WP Cache Phase 2
21:43:10 /favicon.ico Setting up WordPress actions
21:43:10 /favicon.ico Created output buffer
21:43:10 /favicon.ico Cookie detected: comment_author_e118a5144ffaddbfed4914cc1c278eea
21:43:10 /favicon.ico Cookie detected: comment_author_email_e118a5144ffaddbfed4914cc1c278eea
21:43:10 /favicon.ico Cookie detected: wordpress_test_cookie
21:43:10 /favicon.ico Cookie detected: wordpress_logged_in_e118a5144ffaddbfed4914cc1c278eea
21:43:13 /favicon.ico Output buffer callback
21:43:13 /favicon.ico 404 file not found not cached