Issue title: [RemoteRetro/production] FunctionClauseError: no function clause matching in :lib.is_op/2
 Issue body: ## Backtrace



[View full backtrace and more rossdavid@example.net](https://app.honeybadger.io/projects/54737/faults/38349852)
 Comments: 
 Comment 0: resolved by 478de1898408a9e6441f065cab0623989bf8ec92
{'source': 'GithubIssues', 'repo_name_with_owner': 'stride-nyc/remote_retro', 'issue_id': 334890758, 'repo_stars': 540.0}