Hello to everyone;

Recently I bought TP-link Archer VR600 AC2100 v3. Internet was coming to my modem from the WAN port with gpone-ont at home. During installation, I put my newly purchased TP-link Archer VR600 AC2100 v3 into wireless router mode. After the device rebooted, I entered my ISP username and password. I have successfully connected. I haven't had a problem so far. Please correct me if my steps are wrong. My main problem is that when I try to do anything with my laptop, my connection drops. When I do a speed test, I get full speed for the first 5 seconds. Then the speed test freezes and suddenly drops to half speed, sometimes down to 1-10 mbps speeds. Same problem with Steam downloads, download is at 50 mbps for 5 seconds then I get freezing and slow speed. When I check from the TP-Link interface, the ip address given to me by the ISP changes every time after these connection freezes. The interesting thing is that there is no freezing when performing a speed test on mobile, downloading or watching videos. Please share with me if you have any information. I really need it right now. I can't speak English well. I apologize to everyone for this. Thank you in advance for your help and suggestions.