Thank you for your post. Have you made any changes recently to TLS at all in your environment? We will see sometimes after disabling TLS 1.0, that Server 2008 R2 and Windows 7 machines will have issues sending tracker status if TLS 1.2 is not configured correctly. Can you go through the below document and make sure that TLS is configured correctly?
Yeah. Big witch hunt on to disable TLS 1.0
This is almost surely the root cause of this issue.
Thank you! I will work on the TLS 1.2 fixes.