Hi:
It could be… are you disconnecting often ? if you are, your issue could be totally different than that of the players above.
Disconnects can be a pain to troubleshoot… there is some steps you can try here:
The words in blue are links to additional information you may find useful… go through all the steps, including those under “Advanced Troubleshooting”.
If the issue is still present after going through the troubleshooting, you should create your own topic in the Technical Support forum. Include the information requested here:
Alternatively, you may contact Blizzard Support directly here:
https://eu.battle.net/support/en/help/product/diablo3/273/277/solution
and click the Contact Us button towards the bottom of the form. Provide the information requested in the new window that will appear and click the Submit button at the bottom of the form.