Paid Search (Not Set) Spike on 6.21
I'm seeing a spike for (not set) traffic specifically coming from our Paid Search, the (not set) exists in all levels (campaign/ad group/keywords) and the issue is happening across different accounts. Looks like the (not set) was stealing traffic from other campaigns since our adwords report is showing an abnormally lower traffic/conversion.
All basic settings are correct, the accounts have been running for years.
Wondering if this happened to anyone else.