Your connection has been interrupted

We are doing okay, rocking a

Terror zone. Suddenly the control becomes clunky and telegraphed, in a couple of second it says "your connection has been interrupted" and logs out. You log back in next to your body and see that a couple of hours' worth of XP is gone.
That happens to anybody often?
I"m not sure it's most frequent way how I die, but certainly the biggest setback on xp gain...

I feel ya. This is known as a lag Death. It's been a situation on Battle Net from it's inception. The best things to try are:

Use a Wired Connection: If possible, connect your PC or console directly to your router with an Ethernet cable. Wi-Fi connections are more susceptible to interference and packet loss, which is the main cause of "Your connection has been interrupted" disconnects.
Optimize Your Router:

Restart your router and modem to clear the cache and reset the connection.
Place your router in an open space, away from obstructions.
Update your router's firmware.
If you must use Wi-Fi, ensure you are using a 5GHz network rather than 2.4GHz for a faster, more stable signal.

Minimize Network Congestion:

Close other applications or devices that are using significant bandwidth on your network, such as streaming services or large downloads.
Schedule large downloads or system updates (e.g., Windows updates) for times when you are not gaming.

Check Server Status and Location:

Use the in-game chat command /FPS to monitor your latency and frame rate. High latency (ping) indicates a delay in communication with the server.
Ensure you are connecting to a game server geographically close to your physical location.

Contact Your ISP: If you continue to experience high latency or frequent disconnections, there might be a routing issue or problem with your service. Contact your Internet Service Provider (ISP) for advanced troubleshooting or to check for regional service outages.

Yeah, it happened to me as well, but on hardcore...

forums/lost-connection-my-online-hardco ... 19755.html

I can only recommend not to use Wi-Fi and instead use a cable connection.