Database UPDATE queries have fallen drastically

Since last update, I can see drastic fall in SQL UPDATE queries.

Before the update, better security was updating extremely often wp_options and then wp_version_check was also updating wp_options with cron job (or something). Was representing more than 30% of all SQL queries on the server, which is loaded with many other unrelated to WP activity (for normal wordpress dedicated server it must be not 30% but ~80%)

Is that a bug fix, improvement or a new bug?

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