I get the same issue in Oxygen Release (4.7.0) Build id: 20170620-1800 Changes to webapplication root (optional) and web applciation work (optional) are reset to "blank" and "work" respectively. Also, everytime I click apply a new "Loader" tag gets added to the context xml file. <Loader className="org.apache.catalina.loader.DevLoader" reloadable="true" debug="1" useSystemClassLoaderAsParent="false"/>