BUG OR CHEATER??!On Glory Champion Legacy Of Discord

Is this considered normal?
please act quickly and firmly for fair play
Lots of players use this
In fact, I was very surprised when recording that it was not only free players who used this method, it turned out that spender players also.
Most of the free players who use this method are especially from the HKT server, which is very detrimental for me.
they can't be hit by attacks from turents, blinks, and abnormal attack speeds.