What happened:
When applying deployment yaml file with kubectl few out of many host aliases are ignored, only applying partial hostaliases.

I tried with json also but bahavior is same, tried with kubectl edit again bahavior is same.
But when I updated directly in GKE console its applying correctly.

What you expected to happen:

It should apply all host aliases correctly.

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:
we have grouped domains based naked domains, all points to single ip.
changed all hosts to single hostname list and single ip but behaviour is same.

Environment:
GKE

• Kubernetes version (use kubectl version):

kubectl version
Client Version: version.Info{Major:"1", Minor:"18", GitVersion:"v1.18.2", GitCommit:"52c56ce7a8272c798dbc29846288d7cd9fbae032", GitTreeState:"clean", BuildDate:"2020-04-16T23:35:15Z", GoVersion:"go1.14.2", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"15+", GitVersion:"v1.15.11-gke.9", GitCommit:"e1af17fd873e15a48769e2c7b9851405f89e3d0d", GitTreeState:"clean", BuildDate:"2020-04-06T20:56:54Z", GoVersion:"go1.12.17b4", Compiler:"gc", Platform:"linux/amd64"}

• Cloud provider or hardware configuration:
  GKE
• OS (e.g: cat /etc/os-release):
  COS
• Kernel (e.g. uname -a):
• Install tools:
• Network plugin and version (if this is a network-related bug):
• Others: