The field was missing, causing genesis to be exported with empty chain IDs. This would then cause a panic on import, as we try to set the last observed nonce to the same (empty) chain more than once.
Testing completed
[x] test coverage exists or has been added/updated
[x] tested in a private testnet
Breaking changes
[x] I have checked my code for breaking changes
[x] If there are breaking changes, there is a supporting migration.
Background
The field was missing, causing genesis to be exported with empty chain IDs. This would then cause a panic on import, as we try to set the last observed nonce to the same (empty) chain more than once.
Testing completed
Breaking changes