Players receive an idle warning message if they are inactive during battle. To bypass the warning, simply move the Champion.
If no movement is detected from the player for an extended period of time, they will incur penalties. These penalties include the forfeiture of combat rewards, and the battle will be treated as a loss regardless of the outcome.
It is possible for the system to detect a player as inactive due to connectivity issues, so be sure to check our Game Connectivity Issues article for troubleshooting tips.