Hi there, I don't know who's that "SounthingNorth" guy is and I have no links with him, I'm here to clarify SaMiR a bit, yes there's a tool and I will not disclose its name since it will be beneficial for cheaters out there, though.
Its not always lag tools, i have been facing Packetloss problems back in the days in 2020. All because of losses of packets either being send or receive. It looks exactly like the tool you are talking about @Samir, and as I have tested the tool somewhere before, it does the same thing. What exactly the tool does is, it revokes the packet either in sending or receiving.
Internet in Pakistan is unstable with high jitters, and sometimes people face packet loss.
Final words are it can be packet loss as its a common internet problem here.