I have the same Problem on 1 (KSC Adminserver) from 15 Clients.
The other 14 are working without the update malfunction.
We use since 12.03.2019 the KES 11.1.15919 and KSC 11.0.0.1131
Till March 2019 we used 10.x, there was no such Problem.
I reinstalled yesterday the KSC, unfortunetly without changes.