Advertisers using Google Ads have reported unusual spikes in Search Lost IS (Budget) percentages.
Multiple accounts, including those utilizing the Top of page bid strategy, observed increases reaching between 79% and 90%, while budgets and spend remained stable or even increased.

This potential discrepancy may stem from a reporting discrepancy in metrics, delayed auction data processing, or a temporary UI issue.
This update was shared by Rakshit Shetty.