cannot refresh cli unless all endpoints are available

I use the maas cli, and occasionally it starts wrting a WARNING to stdout:
**********************************************************************
*** WARNING! The API on the server differs from the description that
*** is cached locally. This may result in failed API calls. Refresh
*** the local API description with `maas refresh`.
**********************************************************************

its fairly annoying that that goes to stdout (it should go to stderr).

I have 6 different maas enpoints that i've logged into. They're on different networks, and I'm not always attached to all of them.
If I want to 'refresh' the one that gave me that warning i have to
a.) be connected to *all* of them at the same time
b.) remove any i can't get to (maas logout) and then refresh (maas refresh) and then add the others back.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: maas (not installed)
ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
Uname: Linux 4.4.0-2-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Feb 10 14:45:25 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-07-23 (202 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
SourcePackage: maas
UpgradeStatus: No upgrade log present (probably fresh install)