Miscellaneous behavioral debugs versus android release mode - some features don't work

I have a screen that has a Drawer. The arrow icon on the top action bar and the click to pull out the drawer are also disabled in my release version, while they work fine in my debug version of the app. It is completely unknown why this is happening as there are no feature flags in the application to enable or disable any such features with build options. Any help is appreciated as we are close to release.