Your game is having trouble maintaining a stable connection despite being online. Even though your internet seems fine, there could be other factors causing this. First, try disabling any vpn or firewall temporarily, as they can interfere with online games. Make sure your router firmware is up-to-date too. Since you're using an ethernet connection, try using a different cable or port on the router to rule out hardware issues. You could also reset your router to clear any potential glitches. Lastly, check if your game has any updates or if there’s an issue with the game server itself. If all else fails, contact your Isp to see if there are any issues with your connection that aren't immediately visible.