Reddit proof fails with "No server-given hint" (code=306)

Hello,

I am seeing an issue with a new Reddit proof.

Account details

• Keybase username: seph29
• Reddit username: seph29_-

Proof

https://www.reddit.com/r/KeybaseProofs/comments/1wdlfkg/my_keybase_proof_redditseph29_keybaseseph29/

Command

keybase id seph29

Result

OK "seph29_-" on reddit failed: No server-given hint for sig=ff1244df4d971fc238b17bfd195769c8e46491a770e075238181d1406117ce1a0f (code=306)

The Reddit post is public and the proof content appears correct.