After flutter/engine#40824, there appears to be a flaky golden file test in the engine that is blocking other PRs from landing (example: flutter/engine#40924).

The individual dots to the right show different colors, meaning a unique image was generated for each commit.
This is with the fuzzy matching algorithm set for this test:

Also, it looks like this image is even flaking in post submit, because the same test is listed as untriaged on the main branch: https://flutter-engine-gold.skia.org/

In the framework we have the tree go red if an unapproved image shows up in post submit, maybe the engine implementation should do the same.

cc @mdebbar @dnfield @chinmaygarde @gaaclarke