Short answer: do not change your website solely because one rank tracker reports a sudden drop. On October 27, 2026, Semrush described automated Google requests that can receive different results from those a typical user would see. Compare the alert with Search Console, the same query and a longer time window.
This does not prove that your own drop is a measurement error. Technical failures, competition and changing demand remain possible. The useful question is which independent signals support the conclusion.