This new update will results in better lower positions results
Google updated the data anomalies page to say they made an “incremental improvement in Google’s logging system now provides better accounting for results in lower positions.” Google explained that “this change might cause increase in impressions, but also a decrease in average positions.”
This update may have hit from 14th July, 2017, as the metrics were noticed different from the way they used to be measured in the lower positions.the metrics may look different because of how Google measures the search results in the lower positions
The data anomalies page has been updated which has results in “incremental improvement in Google’s logging system now provides better accounting for results in lower positions.
There will be no impact on the real ranking because of these reporting changes.
Google explained “this change only effects Search Console reporting, not your actual performance on Google Search.”
Gary Illyes from Google posted the news on Twitter adding “we’ve updated the product updates help center article with some details about the recent Search Analytic change.