Third-party automated bid/campaign optimization tools, if not fully disconnected from a campaign, can silently revert manual changes a seller makes — the automation's last-known state wins, overwriting hand-tuned bids or settings with no visible warning.
Practical implication: before doing manual optimization work on a campaign (e.g. acting on Data Dive Rank Radar or Per-Keyword Rank Ceiling & SQP Competitor Conversion Benchmarking findings), confirm any automated bidder is fully turned off or disconnected for that campaign — otherwise a correct manual fix can be quietly undone, making the diagnosis look wrong when it was actually never allowed to persist.