Author merge deletes work details

I've only noticed this one time. After merging authors, work details were deleted from record.
### Evidence / Screenshot (if possible)

### Relevant url?

https://openlibrary.org/works/OL138052W/Alice's_Adventures_in_Wonderland?_compare=Compare&b=13&a=12&m=diff
### Steps to Reproduce

This does not seem to be a regular occurrence, so I cannot reproduce.

* Actual: Work details deleted following author merge.
* Expected: Work details should not be affected by author merge.

### Details

- **Logged in (Y/N)?**
- **Browser type/version?**
- **Operating system?**
- **Environment (prod/dev/local)?** prod

### Proposal & Constraints

### Related files

### Stakeholders

@cdrini @mekarpeles @jimchamp