ADFS 3.0 nodes up/down

I am fairly new to the Big-IP platform, so forgive me if there is an obvious answer to this.... I am on 11.3 and attempting load balancing ADFS 3.0. I wasn't having luck with SNI monitor then I realized it's not supported fro 3.0 until 11.4.1. That being the case, I configured TCP monitors instead until we can upgrade to >11.4.1, hoping to get this working.

 

I am still having issues, however. My nodes will appear online for a period of time and everything seems fine. Then they will go offline for awhile then back online again. Does any one have any suggestions? I am at a loss.

 

Thanks Richie