Ciptex experienced a minor incident on December 11, 2025 affecting Twilio Flex Application Platform, lasting 3d 18h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Dec 11, 2025, 09:45 PM UTC
We have detected potential service disruption through our monitoring systems and are actively investigating. A detailed assessment of the impact and affected services will be provided within the next 30 minutes.
- investigating Dec 11, 2025, 09:50 PM UTC
Twilio engineers have identified a high impact bug with Flex UI 2.15 where the Flex Token does not refresh before expiration, causing Voice SDK errors and Twilsock issues. This results in: Calls dropping, audio may fail, call controls become unresponsive, and agents may not receive calls. Flex customers should avoid upgrading to Flex UI 2.15 until resolved. They expect to provide another update in 1 hour or as soon as more information becomes available.
- investigating Dec 11, 2025, 10:39 PM UTC
Twilio engineers are continuing to work on a fix for the high impact bug with Flex UI 2.15. Flex customers should avoid upgrading to Flex UI 2.15 until resolved. We expect to provide another update in 8 hours, or as soon as more information becomes available.
- investigating Dec 12, 2025, 06:19 AM UTC
Twilio engineers are continuing to work on a fix for the high impact bug with Flex UI 2.15. Flex customers should avoid upgrading to Flex UI 2.15 until resolved. We expect to provide another update in 8 hours, or as soon as more information becomes available.
- identified Dec 12, 2025, 11:08 PM UTC
Twilio engineers are continuing to work on a fix for the high impact bug with Flex UI 2.15. Flex customers should avoid upgrading to Flex UI 2.15 until resolved. We expect to provide another update in 16 hours, or as soon as more information becomes available.
- identified Dec 14, 2025, 02:08 PM UTC
Twilio engineers are continuing to work on a fix for the high impact bug with Flex UI 2.15. Flex customers should avoid upgrading to Flex UI 2.15 until resolved. We expect to provide another update in 24 hours, or as soon as more information becomes available.
- identified Dec 15, 2025, 10:28 AM UTC
Twilio engineers are continuing to work on a fix for the high impact bug with Flex UI 2.15. Flex customers should avoid upgrading to Flex UI 2.15 until resolved. We expect to provide another update in 24 hours, or as soon as more information becomes available.
- monitoring Dec 15, 2025, 02:29 PM UTC
Twilio engineers have implemented a fix for the high impact bug with Flex UI 2.15. A new patch has been released, and the customers should not encounter any other errors. We expect to provide another update in 2 hours, or as soon as more information becomes available.
- resolved Dec 15, 2025, 04:42 PM UTC
Following comprehensive monitoring, we can confirm that the incident has been fully resolved and all services have returned to normal operation.