Both the data of "Keyword Distribution" and "Reverse Product Lookup" are rolling updated, Inconsistent number of search results rendered due to inconsistent update times.
For eg. ASIN B07TZSC1P3
Total searches is 3368 in Keyword Distribution
Total searches is 3022 in Reverse Product Lookup
If you encounter the same problem, you can query an ASIN in the reverse product lookup function to trigger the automatic update of the system，and refresh the Keyword Distribution page, the data on both sides will be synchronized.