SCSM 2012 R2 Workflows and DW Jobs Do Not Come Up After SQL Node Switch

Hello,
We have a MS SQL Server cluster consisting of 2 nodes in our environment. After nightly OS updates and consequent server restart of one of SQL Cluster nodes (where an update takes place) SCSM workflows stop working, in certain cases Data Warehouse jobs also
stop until I restart SCSM server and start DW jobs manualy.
According to logs SQL server switches a node succesfully, but still it is impossible to connect to the SQL Server for 1-3 minutes. Is this a normal behavior? Is there any best practice for handling SQL connection issues and patch management on SQL cluster
nodes?
Thanks!

Restart the system center data access service on the workflow server (the SCSM management group server you installed) any time the SQL server migrates. the workflow service runs every 30 seconds, looking for work to do, and if it fails a few times, then
it stops looking. restarting the service is the only way that i'm aware of to fix it. 

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