"user" on twitter/github failed: context canceled (code=170)

Affects all attempts to verify Twitter/GitHub proofs. Prior to this issue, all Twitter proofs were failing with 404 Not Found (code=240)

OS: macOS Sierra 10.12.4 (16E195)
Keybase Client: 1.0.22-20170502110012+a3c4856
Keybase Service: 1.0.22-20170502110012+a3c4856

Command: keybase -d id zenexer
Relevant output:

1b3 + API GET https://twitter.com/Zenexer/status/752620356578533376 [tags:ID2=kFScbP58hd9N,API=vQNpo2hpHViW]
1b4 - API GET https://twitter.com/Zenexer/status/752620356578533376: err=ok, status="200 OK", jsonBytes=0 [tags:ID2=kFScbP58hd9N,API=vQNpo2hpHViW]
1b5 PVL @(service:twitter script:0 pc:2) Error code=INTERNAL_ERROR: context canceled [tags:ID2=kFScbP58hd9N]
1b6 PVL CheckProof failed: context canceled (code=170) [tags:ID2=kFScbP58hd9N]
✔ "zenexer" on twitter failed: context canceled (code=170)

Command: keybase track [redacted]
Output:

▶ INFO Identifying [redacted]
✔ <tracked> public key fingerprint: [redacted]
You last followed [redacted] on 2017-05-13 01:25:36 EDT
฿  bitcoin [redacted]
✔ <tracked> "[redacted]" on reddit: https://www.reddit.com/r/KeybaseProofs/comments/[redacted]/ [cached 2017-05-13 01:24:46 EDT]
✔ <tracked> admin of DNS zone [redacted]: found TXT entry keybase-site-verification=[redacted] [cached 2017-05-13 01:24:47 EDT]
✔ <tracked> "[redacted]" on github failed: context canceled (code=170)
✔ <tracked> "[redacted]" on twitter failed: context canceled (code=170)
▶ INFO Your view is up-to-date

Start by reproducing the failure with keybase -d id zenexer and keybase track [redacted], then trace the Twitter and GitHub proof verification flow associated with the logged context canceled error. Done means both proof checks complete successfully instead of returning code 170.