Hi,
Always ON role is going offline continuously.
Please find the cluster events.
Event id:1069
Cluster resource 'AlwaysON' of type 'SQL Server Availability Group' in clustered role 'AlwaysON' failed.
Based on the failure policies for the resource and role, the cluster service may try to bring the resource online on this node or move the group to another node of the cluster and then restart it. Check the resource and group state using Failover Cluster
Manager or the Get-ClusterResource Windows PowerShell cmdlet.
Event id:1205
The Cluster service failed to bring clustered role 'AlwaysON' completely online or offline. One or more resources may be in a failed state. This may impact the availability of the clustered role.
Harsha