Build hung never finish in the UI even after killing agent and all the related process

Hi, we got this build:

https://bamboo-extranet.atlassian.com/build/result/viewBuildResults.action?buildKey=JST-NONGAPPS-FFWDRV&buildNumber=176 that was hung. A manual stop didn't work so we killed the process and the agents.

In spite of doing that the UI still thinks that is building something, even when the agent (2@atlassian25) was idle and after that building other plans.

You can check the thread-dump of the server here: https://extranet.atlassian.com/jira/browse/ADM-12681

The plan was executed again, but the UI still thinks it is building 176. Maybe it is because "Concurrency builds" is set to 2.