channel settings in template composer take an extremely long time to load

I am even getting stacks like below.

Also, it is very confusing, as sometime you first see the previous loaded channel properties until the new once are loaded. This results in that for example when clicking on the russian site, you see for 10 seconds the dutch title until the response is loaded

[INFO] [talledLocalContainer] Caused by: java.net.SocketTimeoutException: SocketTimeoutException invoking http://127.0.0.1:8080/site/_cmsrest/channels/: Read timed out
[INFO] [talledLocalContainer] at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[INFO] [talledLocalContainer] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
[INFO] [talledLocalContainer] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
[INFO] [talledLocalContainer] at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.mapException(HTTPConduit.java:1467)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1452)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.AbstractConduit.close(AbstractConduit.java:56)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.http.HTTPConduit.close(HTTPConduit.java:660)
[INFO] [talledLocalContainer] at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:62)