Better rankings do not guarantee more organic clicks.
Average position only describes where a result appeared after a search happened.
Clicks also depend on demand, impressions, click-through rate, and the shape of the results page.
Start in Search Console with query-by-page data.
Split brand from non-brand, then compare devices, countries, and page types.
If impressions fell, investigate demand and coverage.
If impressions held but CTR fell, inspect the live result and the snippet.
Diagnose the layer that changed before rewriting the page.