Assign to Build to Channel fails, timing out

I’ve successfully pushed a build, and it built successfully. When I try to deploy to channel “Production” the button text in the modal changes to “deploying…”, the status bar creeps along, but ultimately it just stops. The underlying screen changes from the list of builds to to “Let’s see, if this, then… where was I?”. When I reload the build screen, it sometimes doesn’t work for a few minutes. When it does, I can see the full build list, but my channel assignments failed. Sometimes at that point the modal button still says “deploying” when I try again. This is app 77835bb5. I’m stuck here; I can’t use live deploy without assigning to the channel, and it’s just failing without any explanation. thanks!