Recent Crawl/Query Rates Incorrectly Show 0.00 Items Per Second

Problem: "Recent crawl rate" and "Recent query rate" statistics incorrectly show 0.00 items per second on the Search Administration page. Confirmed the crawl rate from the Crawl Health Reports page. Confirmed that the number of searchable items was increasing. Found a TON of update conflict errors (event ID 6398 and 6482) in the Application event …