Unpacked deployment is lost across restarts

An unpacked war deployment does not remain deployed across restarts.

[199](ironmaiden:bin) > ls ../standalone/deployments/
README.txt ROOT.war ROOT.war.dodeploy
[200](ironmaiden:bin) > ./standalone.sh
...
07:01:21,122 INFO [org.jboss.as.deployment] (DeploymentScanner-threads - 1) Found ROOT.war in deployment directory. To trigger deployment create a file called ROOT.war.dodeploy
07:01:21,133 INFO [org.jboss.as] (Controller Boot Thread) JBoss AS 7.0.0.Beta4-SNAPSHOT "(TBD)" started in 2104ms - Started 91 of 119 services (25 services are passive or on-demand)
07:01:21,144 INFO [org.jboss.as.server.deployment] (MSC service thread 1-5) Starting deployment of "ROOT.war"
...
07:01:54,436 INFO [org.jboss.as.server.deployment] Stopped deployment ROOT.war in 34ms
[201](ironmaiden:bin) > ls ../standalone/deployments/
README.txt ROOT.war ROOT.war.deployed

[202](ironmaiden:bin) > ./standalone.sh
...
07:02:22,101 INFO [org.jboss.as.deployment] (DeploymentScanner-threads - 1) Found ROOT.war in deployment directory. To trigger deployment create a file called ROOT.war.dodeploy
[203](ironmaiden:bin) > ls ../standalone/deployments/
README.txt ROOT.war

Note that the same issue does not exist when the ROOT.war is an archive rather than a directory.

[215](ironmaiden:bin) > ls ../standalone/deployments/
README.txt ROOT.war ROOT.war.dodeploy
[216](ironmaiden:bin) > ./standalone.sh
07:04:36,536 INFO [org.jboss.as.server.deployment] (MSC service thread 1-6) Starting deployment of "ROOT.war"
..
07:05:38,624 INFO [org.jboss.as.server.deployment] Stopped deployment ROOT.war in 41ms
[217](ironmaiden:bin) > ls ../standalone/deployments/
README.txt ROOT.war ROOT.war.deployed

[218](ironmaiden:bin) > ./standalone.sh
..
07:06:05,532 INFO [org.jboss.as.server.deployment] (MSC service thread 1-8) Starting deployment of "ROOT.war"
..
07:06:28,313 INFO [org.jboss.as.server.deployment] Stopped deployment ROOT.war in 34ms
[219](ironmaiden:bin) > ls ../standalone/deployments/
README.txt ROOT.war ROOT.war.deployed