Suboptimal performance for Campaigns using automated bidding strategies

Between November 21, 04:40 PM PST and November 26th, 11:00 PM PST, some advertisers might have noticed sub-optimal performance for some campaigns using automated bidding strategies. The impact was limited to some Search, Shopping (Including Search and Shopping campaigns extended to audience network) or Performance Max (PMAX) campaigns, with no impact on Audience or Display campaigns.
New Campaigns:
Some of the new non-ECPC campaigns and new portfolios created between November 21st, 4:40 PM PST and November 26th, 11:00 PM PST, might not have met targets or had lower than expected spend.
Existing Campaigns:
Some of the established Portfolio bid strategies may not have responded to target changes or might have missed the target between November 21, 04:40 PM PST and November 26th, 11:00 PM PST. Additionally, some non-ECPC campaigns may have also exhibited this behavior.