diff --git a/copy/copy.go b/copy/copy.go
index 57a8d5f1e4..01b5dc4694 100644
--- a/copy/copy.go
+++ b/copy/copy.go
@@ -690,6 +690,7 @@ func (c *copier) copyOneImage(ctx context.Context, policyContext *signature.Poli
 	//   that the compressed version coming from a third party may be designed to attack some other decompressor implementation,
 	//   and we would reuse and sign it.
 	// - Finally, let the image format handler influence this (in particular to disable substitution for OCI artifacts).
+	// FIXME: More debug logs about this decision?
 	ic.canSubstituteBlobs = ic.cannotModifyManifestReason == "" && options.SignBy == "" && ic.src.CanSubstituteLayers()
 
 	if err := ic.updateEmbeddedDockerReference(); err != nil {
@@ -1413,6 +1414,7 @@ func (ic *imageCopier) copyBlobFromStream(ctx context.Context, srcStream io.Read
 	canModifyBlob := !isConfig && ic.cannotModifyManifestReason == ""
 	// === Deal with layer compression/decompression if necessary
 	layerCompressionChangeSupported := ic.src.CanChangeLayerCompression(srcInfo.MediaType)
+	// FIXME: More debug logs about this decision?
 	canChangeCompression := canModifyBlob && layerCompressionChangeSupported
 	compressionMetadata := map[string]string{}
 	var inputInfo types.BlobInfo