Can't Update Firmware

When using Chrysalis via the hosted web client, I’m unable to update the firmware or see the existing firmware of my new Atreus. This is true in multiple browsers and multiple OSes (Windows/Mac). I get the same console error each time during the Flashing stage of update.
[LOG] [async]: error: unexpected RX value in state 0, waited for “CATERIN”
Happy to file a Github bug if this is a bug.