ReferenceError: ‘PageMinimized’ is undefined

ReferenceError: ‘PageMinimized’ is undefined

This error was discovered after upgrading our SharePoint Server 2016 Enterprise farm to April 2018 CU, 16.0.4768.1001

I am not saying that this CU caused it, but that this happen after the CU install. Coincidence?

After troubleshooting for about 2 hours I believe this is a problem with the F5 load balancer because if I point my URL to one web front end in my host file it worked.

I will update with the F5 fix if I can get the network guy to give up the goods..