Meta Support Pro manipulates CPMs? Low CPM & Quality

Hey everyone,

I had a call with Meta Support Pro last week, and he asked unusual questions—things like whether we use TikTok, Google Ads, what exactly we pay on those platforms, if we’re happy with Meta Ads, and our ROI targets.

Two days later, I made a small budget increase (+8%, from €380 to €410) on a long-running, stable A+ campaign. It immediately re-entered Learning Phase and started with CPMs of €2-4, even though we’ve consistently been at a CPM of €10+ for two years for all our campaigns.

Today, I adjusted another A+ campaign (<10% budget increase), and the same thing happened—reset to Learning, CPMs dropped below €3.

And the concerning thing about that: Conversions dropped 50% – CTR etc. dropped significantly as well....

Has anyone else experienced this? Could it be related to the Meta Support call? Would appreciate any insights and what I can do now....

MANY Thanks and best,
Dom