Try ping plotter [google it] to determine if its an issue with your router, your ISP or SE.

Go into adapter settings and check the status of your connection after the DC. If its duration is short, it could mean your connection is disconnecting and then quickly reconnecting.

Try moving your ethernet cord into another port on the router. If its Wireless, try reinstalling/updating your drivers. Try reinstalling/updating LAN drivers if it fails from switching ethernet ports. If that fails on LAN, use a different ethernet cord.

If none of this seems to have an effect, download a FREE VPN to run the game on. If you are STILL having issues with your connection, its a local/router issue.