Comment 6 for bug 1644333

So it seems like this issue had gone away - our QA automation had been successfully deploying arm64 systems by passing only maas tag constraints w/ Juju 2.8. Today we happened to update our juju controller to 2.9 - and now this issues seems to have come back. arm64 nodes will not deploy unless we explicitly pass the arch=arm64 constraint. Is this considered a regression?