Paper/paper-server/nms-patches/PathfinderGoalPanic.patch

--- a/net/minecraft/server/PathfinderGoalPanic.java
+++ b/net/minecraft/server/PathfinderGoalPanic.java
@@ -57,6 +57,12 @@
 
     @Override
     public boolean b() {
+        // CraftBukkit start - introduce a temporary timeout hack until this is fixed properly
+        if ((this.a.ticksLived - this.a.hurtTimestamp) > 100) {
+            this.a.setLastDamager((EntityLiving) null);
+            return false;
+        }
+        // CraftBukkit end
         return !this.a.getNavigation().n();
     }