html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/3985#issuecomment-650800165,https://api.github.com/repos/pydata/xarray/issues/3985,650800165,MDEyOklzc3VlQ29tbWVudDY1MDgwMDE2NQ==,8419157,2020-06-28T17:53:49Z,2020-06-28T17:53:49Z,NONE,"Sorry for the late reply.
I have been using this function in my projects and as such it is minimum functional.
However, I will try to investigate a simpler example that replicate the issue.

Lastly, perhaps you have a better idea for groupby over multi-dimension without stacking the dimensions?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,603309899
https://github.com/pydata/xarray/issues/3985#issuecomment-616650521,https://api.github.com/repos/pydata/xarray/issues/3985,616650521,MDEyOklzc3VlQ29tbWVudDYxNjY1MDUyMQ==,8419157,2020-04-20T16:05:02Z,2020-04-20T16:05:02Z,NONE,Using `git bisect` I am able to narrow down to this PR #3807  that introduced the regression.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,603309899