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
780426518,MDExOlB1bGxSZXF1ZXN0NTUwMzIxOTU1,4771,Always force dask arrays to float in missing.interp_func,14371165,closed,0,,,3,2021-01-06T10:18:55Z,2021-05-18T18:17:30Z,2021-01-12T10:15:28Z,MEMBER,,0,pydata/xarray/pulls/4771,"`scipy.interpolate.interp1d` always forces float so make sure that `da.blockwise` understands that as well.

- [x] Workaround for  #4770
- [x] Tests added
- [x] Passes `isort . && black . && mypy . && flake8`
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