On December 8, 2021 from around 5:00 p.m. PST, to 8:15 p.m. PST, users in South Korea who’ve enabled 2FA via SMS were receiving incomplete messages and were unable to login to Slack.
After a thorough investigation, we found that this occurred when the user’s language was set to Korean. This impacted carriers which prevented the 2FA messages from being delivered successfully in Korean.
A fix has been deployed to force the language of the message to English. This will ensure the full messages are delivered to enable log in.
8:06 AM PST
We’re happy to report that customers should no longer have issues with receiving 2FA codes when the language is set to Korean.
Apologies for the disruption, and thank you for your patience.
8:34 PM PST
We are continuing to investigate issues with receiving 2FA codes when the language is set to Korean. Customers using English should be receiving 2FA codes correctly. Our apologies for the disruption.
6:14 PM PST
Some customers in Korea aren't receiving 2FA codes set to Korean, or they may be receiving 2FA codes with garbled text.
We're investigating now and will be back with more information as soon as it's available, or in 30 minutes.
5:46 PM PST