The game is using several mechanisms to block actions from players with the same connection. In some cases such as mobile data, university networks, free WiFi, VPN etc, you will have the same IP address with other players in-game, even if you don't know them in person. Thus the game will both you treat as using the same internet connection and you will be blocked from specific actions such as sending commands/resources to the same target and duration will depend by game settings.
In case you're using mobile data, unfortunately we're not able to assist you. The reason is that many cellular providers are giving the same IP in many users at the same time. Please get in touch with them and discuss the possibility for a static IP.