This is an issue that is based around the fact that the IP cameras don't show the menu over an IP stream. The menu still pops up, preventing the user from doing anything until the menu button is pressed again to minimize the menu. This is why your remote seems to intermittently work, you must be pressing the menu button at some point, disabling other remote functions. This feature is there to prevent the camera menu from showing up in recordings and live streams. The menu will still show up on the HDMI and SDI outputs of the camera.