Migrate storage fails with multiple messages "Throttling request took X ms" for OCP 3

Issue

When running command to migrate storage manually results in errors:

# oc adm migrate storage --include='*' --confirm 

....
I1022 13:40:08.064910   23577 storage.go:305] Throttling request took 227.237631ms, request: GET:https://node.example.com:443/apis/user.openshift.io/v1/users/userAAA
I1022 13:40:08.064934 unchanged:  users/userYYY
I1022 13:40:08.065969   23577 storage.go:305] Throttling request took 228.286875ms, request: GET:https://node.example.com:443/apis/user.openshift.io/v1/users/userXXX
I1022 13:40:08.066006 unchanged:  users/userZZZ
summary: total=42033 errors=0 ignored=0 unchanged=41987 migrated=46
error: exited without processing all resources: invalid character 'T' looking for beginning of value