id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
589471115,MDExOlB1bGxSZXF1ZXN0Mzk1MDE3NjEz,3906,Fix for stack+groupby+apply w/ non-increasing coord,6200806,closed,0,,,4,2020-03-28T00:15:20Z,2020-03-31T18:29:35Z,2020-03-31T16:10:10Z,CONTRIBUTOR,,0,pydata/xarray/pulls/3906,"<!-- Feel free to remove check-list items aren't relevant to your change -->

 - [x] Fixes #3287
 - [x] Tests added
 - [x] Passes `isort -rc . && black . && mypy . && flake8`
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API

I've added a check within `groupby.__init__` for monotonicity of the coords, which makes my test pass, but it causes three existing tests to fail.  Getting the logic right that properly distinguishes among these different cases is escaping me for now, but it does seem like this call to `unique_value_groups` within `groupby.__init__` is where the re-sorting is occurring.  Feedback welcome.  TIA!
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3906/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
201770526,MDExOlB1bGxSZXF1ZXN0MTAyMjA1NDM3,1219,ENH import ufuncs module in toplevel namespace,6200806,closed,0,,,1,2017-01-19T05:51:02Z,2017-01-19T05:59:26Z,2017-01-19T05:59:26Z,CONTRIBUTOR,,0,pydata/xarray/pulls/1219," - [x] closes #1216 
 - [ ] tests added / passed
 - [ ] passes ``git diff upstream/master | flake8 --diff``
 - [ ] whatsnew entry

Let me know if you want tests and/or what's new; wasn't sure since this is so small.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/1219/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
130064443,MDExOlB1bGxSZXF1ZXN0NTc3NTczMzg=,736,Accept rename to same name,6200806,closed,0,,,4,2016-01-31T02:17:01Z,2016-02-02T03:44:33Z,2016-02-02T01:33:03Z,CONTRIBUTOR,,0,pydata/xarray/pulls/736,"Closes #724
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