Looking around, it seems this has come up before and has been fixed. I guess something else has changed again, hoping for another fix :)
Karabiner 10.22.0
IntelliJ IDEA 2017.1
Build #IU-171.3780.95, built on March 20, 2017
JRE: 1.8.0_112-release-736-b13 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.11.6
Looking around, it seems this has come up before and has been fixed. I guess something else has changed again, hoping for another fix :)
Karabiner 10.22.0 IntelliJ IDEA 2017.1 Build #IU-171.3780.95, built on March 20, 2017 JRE: 1.8.0_112-release-736-b13 x86_64 JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o Mac OS X 10.11.6
AXNotifier is enabled for Java apps.
http://pastebin.com/eekx0z40