Amazon shifting Buybox toward FBM? Anyone else seeing this?

We’ve been holding steady at 45–50% Buybox share for a couple of years, but recently that’s dropped to around 30–35%. Nothing changed on our end. Same repricing setup with Channel Max:

• FBA: Match
• FBM: Maximize Buybox with Channel Max algo (basically tries to win BB at highest possible price)

Now I’m thinking of switching both to Match. Or even go full aggressive and target 100% Buybox share, but that’s probably gonna kill our margins a bit.

What’s weird is I’m suddenly seeing FBM sellers take a bigger piece of the pie, even newer sellers with weaker account metrics. Never used to be like this.

Is this a new shift in Amazon policy or algorithm? Anyone else seeing FBM getting more love lately?

Curious what y’all are seeing.