AlwaysOn in SQL Server 2016 Standard Edition

Hi everyone, 

Currently I am exploring and testing out this new feature (AlwaysOn) in SQL Server 2016 Standard Edition since Microsoft unlock this feature in standard edition but with limitation. 

Here's the settings that I did and I already point the SQL connection to SQL cluster node in my application using ODBC :-

SQL Servers : SQL2016-1 (Primary server) , SQL2016-2 (Secondary server) and both servers are virtual machines but in different host machines. 
Cluster SQL Server : SQL2016-C 
Numbers of Availablity Groups : 4 (since I have 4 databases) 

Next, I encounter some connection issues when I open my application, mentioned that the database is not available.
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Scenario 1 :-
I open 'Failover Cluster Manager' and check SQL2016-C that the current host server is on SQL2016-1 , but the databases already failover to SQL2016-2, vice versa. End up I have to manual failover 
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Scenario 2 :-
I open 'Failover Cluster Manager' and check SQL2016-C that the current host server is on SQL2016-2 , but the databases remains at SQL2016-1, vice versa.
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End up I have to manual failover repeatedly. Does anyone encounter such problem before on standard edition? Is there any extra configuration needed. Hope can get some advice here, else I am unable to move on from database mirroring. 

Many thanks and have a nice day. 

Best Regards, 
            Harn