use explicit "difftype":"modify", to see if it helps

Author: jan-ivar

amendments.json

@@ -4,6 +4,7 @@
       "description": "Use the url spec to parse ice server urls",
       "pr": [2853, 2996, 2998],
       "type": "correction",
+      "difftype": "modify",
       "tests": [
 	"webrtc/RTCConfiguration-iceServers.html"
       ],