There was a recent code change that affected CanvasKit goldens. It didn't land cleanly, so it was reverted then relanded:

• First landing: Use Layer.toImage for golden tests on CanvasKit #135249
• Revert: Reverts "Use Layer.toImage for golden tests on CanvasKit" #136860
• Relanding: Reland "Use Layer.toImage for golden tests on CanvasKit" #136918

The change affects goldens. According to Skia Gold UI the goldens changed as expected:

However, after the reland I noticed that tests were flaky for a couple of commits after the reland happened:

It's as if Skia Gold needed some time to "settle". There's a period of time during which sometimes Skia Gold would reject the new golden. For example, this build failed with "Skia Gold received an unapproved image in post-submit testing". The test generated golden was c8d9d65546ec0142469c967cd644ade0, which, according to the Skia Gold UI, is the correct SHA.