Anybody know why these holes in the project tree keep appearing? I seem to get these for large and small projects. Often invalidating caches & restarting will help heal them up, but they always reoccur. The screenshot is taken some 10mins after such an IDEA cache cleardown and restart. Just enough time to run a junit test class and fire up an internal tomcat 7 container and the hole is back. Simply closing & reopening the project has no effect, nor does synchronising the folder or reimporting the pom.
It always seems to be 3 rows in height regualess of the project and always in the top level of the project. No files are missing in this hole, no hidden files in these folders (excpet the .idea folder). This is IDEA 13.1.4 on CentOS 6.3.