Aireplay-ng not working

Hi. I am taking the ethical hacking course by Zaire’s Qureshi and I am on pre-connection attack’s. I use the aireplay-ng command to disconnect a device from the network. I know my devices MAC address so that is not the issue. I run the aireplay-ng —deauth 0 command and my device does not disconnect? Does anybody know why?

One more thing to note. The program runs and sends the deauthentication packets, and the only thing that happens to the target device is that the connection might get slower for a few seconds. Could it be that my computer is reconnecting so fast that I am not noticing it? I send infinite amount of deauth commands using the 0 argument when running the command.