Permission problem on sys.availability_groups

Given two separate SQL Server (both have version Microsoft SQL Server 2016 (SP2-CU5) (KB4475776) - 13.0.5264.1 (X64) )
with having some AlwaysOn High Availability groups.
We created a SQL Login on both server with only public rights with the script show below. 
The problem is that on ServerA the user can see the content of sys.availability_groups while on ServerB it cannot see anything.
By default the user shouldn't see any content of the system view.

USE [master]
GO
CREATE LOGIN [test_user] WITH PASSWORD=N'passw0rd', DEFAULT_DATABASE=[master], CHECK_EXPIRATION=OFF, CHECK_POLICY=OFF
GO
CREATE USER [test_user] FOR LOGIN [test_user]
GO
execute as login = 'test_user'
go
select suser_name()
GO
SELECT * FROM [master].[sys].[availability_groups];

The following script is used to check the existing rights:

select * from sys.server_permissions per 
join sys.server_principals pri on per.grantee_principal_id = pri.principal_id
where per.permission_name in ('VIEW DEFINITION', 'VIEW ANY DEFINITION')
  and pri.name = 'test_user'