This is why I don't use Tsiklon at all because I noticed that the weapon has limited range when trying the gun in solo mode. Not sure if it's a glitch or was intended. I know Hornet can hit anything from any range but Tsiklon doesn't hit targets far away.
I can't access youtube right now, so I haven't watched the video, but my guess is that there were no damage numbers when trying to shoot enemies far away and they suddenly appeared when shooting enemies in close range.