Trying to submit an edit when inadvertently logged out loses work

I was just trying to split a work into two releases, and I took the time to create a new edit group and describe a new release for the work, but on submission I got:

```
400
Bad Request
API Error: InvalidCredentials
auth token was missing, expired, revoked, or corrupt: auth token (macaroon) not valid (signature and/or caveats failed)
```

It turns out that I'm logged out (my username shows in the top right, I appear to be logged in, but if I try to go to account preferences I get a 403 and it says I may need to log in again). In the meantime, it appears that my edit is lost.

I'm going to try logging back in and then asking my browser to resubmit the form, but this seems sub-optimal.