Hi,
Based on the description, we can try to disable the CEIP via group policy to see if the situation persists. To do this, we can enable the following policy setting:
Computer Configuration\Policies\Administrative Templates\System\Internet Communication Management\Internet Communication settings\Turn off Windows Customer Experience Improvement Program
Regarding this point, the following article can be referred to for more information.
Windows Customer Experience Improvement Program and Resulting Internet Communication in Windows 7 and Windows Server 2008 R2
https://technet.microsoft.com/en-us/library/ee126127(v=ws.10).aspx
Best regards,
Frank Shen