Hi @Nyquist,
I have split your post into a support thread so that we can take a closer look here.
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Is the behavior the same if you reboot your Core, Networking Gear and Android device?