github import api returning issue import status url that 404s

gistfile1.txt

# The problem is that from time to time the GitHub issue import API returns a status url for the issue import
# that when I check that status url, I get a 404 response.

# Below is an example of a request/response pair that came back with a status url that 404'd:

# All of these requests use the header = {'Accept': 'application/vnd.github.golden-comet-preview+json'} 
# Also I authenticate via my username/personal access token. 
# Neither the header nor the auth should pose a problem because it successfuly imports dozens of issues before 
# hitting any issues. 

# The issue data that's POSTed to the issue import endpoint... this is in python format that's passed directly
# to the python requests library:
# Original issue at https://bitbucket.org/pypa/setuptools/issue/9

{'comments': [{'body': '*Original comment by* **Jason R. Coombs (Bitbucket: '
                       '[jaraco](http://bitbucket.org/jaraco), GitHub: '
                       '[jaraco](http://github.com/jaraco))**:\n'
                       '\n'
                       '----------------------------------------\n'
                       '\n'
                       "I'm inclined to say this shouldn't be fixed. The "
                       'updated code now prefers a secure download technique, '
                       'leveraging system downloaders. These measures should '
                       'be suitable to protect against most vectors that would '
                       'employ download or extraction attacks. I say most '
                       "because I can't prove there aren't viable vectors out "
                       'there.\n'
                       '\n'
                       "In other words, I believe we've put reasonable "
                       'safeguards in place to ensure the content is trusted.\n'
                       '\n'
                       'That said, if you believe the potential vulnerability '
                       'is worth the investment, please do provide a pull '
                       'request.\n',
               'created_at': '2014-02-09T20:07:59Z'}],
 'issue': {'body': 'Originally reported by: **Christian Heimes (Bitbucket: '
                   '[tiran](http://bitbucket.org/tiran), GitHub: '
                   '[tiran](http://github.com/tiran))**\n'
                   '\n'
                   '----------------------------------------\n'
                   '\n'
                   "ez_setup.download_setuptools() doesn't limit the amount of "
                   'data that is downloaded with urllib. An attacker can forge '
                   'a HTTP response with a large or even infinite file (e.g. '
                   'netcat < /dev/zero). This can consume lots of memory or '
                   'occupy lots of disk space on /tmp. src.read() should be '
                   'limited to a sane value (e.g. 2-5 MB) and raise an error '
                   'if more data is downloaded.\n'
                   '\n'
                   "ez_setup._extractall() should be limited, too. It's open "
                   'to zip decompression bomb vulnerability.\n'
                   '\n'
                   '----------------------------------------\n'
                   '- Bitbucket: '
                   'https://bitbucket.org/pypa/setuptools/issue/9\n',
           'closed': True,
           'created_at': '2013-06-03T14:42:19Z',
           'labels': ['major', 'bug'],
           'title': 'ez_setup.py download and extraction flooding '
                    'vulnerability'}}
                    
# The response from the issue import API endpoint--it returns HTTP status code 202:

{'created_at': '2016-02-03T12:04:42-08:00',
 'id': 471762,
 'import_issues_url': 'https://api.github.com/repos/jeffwidman/t/import/issues',
 'repository_url': 'https://api.github.com/repos/jeffwidman/t',
 'status': 'pending',
 'updated_at': '2016-02-03T12:04:42-08:00',
 'url': 'https://api.github.com/repos/jeffwidman/t/import/issues/471762'}

# Checking the status url https://api.github.com/repos/jeffwidman/t/import/issues/471762 returns a HTTP 404