Update: I tried unbonding from all three validators at once and it works. However, the process is incredibly slow. On the order of 30 seconds of waiting. And the UI does not tell me that something is happening in the background, I just have to have faith.
Why is this blocked?
I'm not seeing that error but I am experiencing a different one while trying to unbond. This task will be easier to diagnose once Pact is in place so I'll work on it after that.
If the error is not there anymore, let's close this issue and open a new one.