diff --git a/blocked-edges/4.3.0-rc.0.yaml b/blocked-edges/4.3.0-rc.0.yaml
index 91c8cd9e1..bdcafe8da 100644
--- a/blocked-edges/4.3.0-rc.0.yaml
+++ b/blocked-edges/4.3.0-rc.0.yaml
@@ -1,3 +1,6 @@
 to: 4.3.0-rc.0
 from: .*
-# 4.2 -> 4.3 updates occasionally hit RequiredPoolsFailed degradation: https://bugzilla.redhat.com/show_bug.cgi?id=1786993
+# 4.2 -> 4.3 updates occasionally hit FailedCreatePodSandBox events, fixed in rc.3, but in neither 4.2.16 nor rc.0: https://bugzilla.redhat.com/show_bug.cgi?id=1787635
+# 4.2 -> 4.3 updates occasionally hit RequiredPoolsFailed degradation, fixed in 4.2.16 and rc.3, but in neither 4.2.13 nor rc.0: https://bugzilla.redhat.com/show_bug.cgi?id=1786993
+# 4.2 -> 4.3 updates occasionally hit RouteHealthDegraded degradation, fixed in rc.0, but not in 4.2.16: https://bugzilla.redhat.com/show_bug.cgi?id=1790704
+# 4.2.* -> 4.3.0-rc.0 Sometimes workloads on GCP are unreachable during 4.2.x to 4.3.0 upgrade sometimes: https://bugzilla.redhat.com/show_bug.cgi?id=1793635
diff --git a/blocked-edges/4.3.0-rc.3.yaml b/blocked-edges/4.3.0-rc.3.yaml
index 23b01cb6d..4c2d56fbb 100644
--- a/blocked-edges/4.3.0-rc.3.yaml
+++ b/blocked-edges/4.3.0-rc.3.yaml
@@ -1,3 +1,5 @@
 to: 4.3.0-rc.3
-from: .*
+from: 4\.2\..*
+# 4.2 -> 4.3 updates occasionally hit FailedCreatePodSandBox events, fixed in rc.3, but not in 4.2.16: https://bugzilla.redhat.com/show_bug.cgi?id=1787635
+# 4.2 -> 4.3 updates occasionally hit RouteHealthDegraded degradation, fixed in rc.0, but not in 4.2.16: https://bugzilla.redhat.com/show_bug.cgi?id=1790704
 # 4.2.* -> 4.3.0-rc.3 Sometimes workloads on GCP are unreachable during 4.2.x to 4.3.0 upgrade sometimes: https://bugzilla.redhat.com/show_bug.cgi?id=1793635