Instapaper - missing articles, articles stopping half way through

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I've had trouble with Instapaper for the last few weeks - has anyone else?

Here's a log of the latest attempt:

https://pastebin.com/Uu1k0z02

I wonder if this section is relevant?

Could not fetch link http://www.instapaper.com/read/1102480959
Fetched http://www.instapaper.com/read/1101878674 in 1.735467 seconds
Traceback (most recent call last):
File "site-packages/calibre/web/fetch/simple.py", line 497, in process_links
File "site-packages/calibre/web/fetch/simple.py", line 262, in fetch_url
File "site-packages/mechanize/_mechanize.py", line 199, in open_novisit
File "site-packages/mechanize/_mechanize.py", line 230, in _mech_open
File "site-packages/mechanize/_opener.py", line 204, in open
File "site-packages/mechanize/_urllib2_fork.py", line 457, in http_response
File "site-packages/mechanize/_opener.py", line 221, in error
File "site-packages/mechanize/_urllib2_fork.py", line 332, in _call_chain
File "site-packages/mechanize/_urllib2_fork.py", line 571, in http_error_302
File "site-packages/mechanize/_mechanize.py", line 203, in open
File "site-packages/mechanize/_mechanize.py", line 230, in _mech_open
File "site-packages/mechanize/_opener.py", line 193, in open
File "site-packages/mechanize/_urllib2_fork.py", line 344, in _open
File "site-packages/mechanize/_urllib2_fork.py", line 332, in _call_chain
File "site-packages/calibre/utils/browser.py", line 28, in https_open
File "site-packages/mechanize/_urllib2_fork.py", line 1116, in do_open
File "lib/python2.7/httplib.py", line 1136, in getresponse
File "lib/python2.7/httplib.py", line 453, in begin
File "lib/python2.7/httplib.py", line 417, in _read_status
BadStatusLine: ''

http://www.instapaper.com/read/1102480959 saved to
Fetching http://www.instapaper.com/read/1096794787
Failed to download article: Untitled article from /read/1102480959
Traceback (most recent call last):
File "site-packages/calibre/utils/threadpool.py", line 100, in run
File "site-packages/calibre/web/feeds/news.py", line 1137, in fetch_article
File "site-packages/calibre/web/feeds/news.py", line 1132, in _fetch_article
Exception: Could not fetch article. The debug traceback is available earlier in this log