Versionwatch reports [1] that in JBDS 9.0.1, these features are at version 3.3.1 (not 3.1.1):

https://github.com/jbosstools/jbosstools-server/blob/jbosstools-4.3.x/as/features/org.jboss.ide.eclipse.as.feature/pom.xml
https://github.com/jbosstools/jbosstools-server/blob/jbosstools-4.3.x/as/features/org.jboss.ide.eclipse.as.jmx.integration.feature/pom.xml

But in 9.0.0 we had 3.1.0:

https://github.com/jbosstools/jbosstools-server/blob/jbosstools-4.3.0.Final/as/features/org.jboss.ide.eclipse.as.feature/pom.xml
https://github.com/jbosstools/jbosstools-server/blob/jbosstools-4.3.0.Final/as/features/org.jboss.ide.eclipse.as.jmx.integration.feature/pom.xml

So, in master, we have 3.2.0, which is seen by VW as being a lower version.

Solution: fix features in 4.3.x branch to use correct version of 3.1.1, or bump master to 3.4.0.

[1] https://devstudio.redhat.com/10.0/snapshots/builds/devstudio.versionwatch_master/latest/report_detailed_all.html and https://devstudio.redhat.com/10.0/snapshots/builds/devstudio.versionwatch_master/latest/report_detailed_all.html