Driver signing error

Question

I made a very small change in some strings in the code of the driver which had been previously signed by Microsoft. A totally benign change for which I did not expect to see any issues. Instead, I get the following error message which may make sense to some Microsoft staff but makes no sense to me. I've even reverted the code back to the same code base which was previously approved by Microsoft but I continue to get this error.

Scanning Notes {"code":"4001","details":{"errorInfo":"BlockingDetectionFound"},"innerError":null}

Can someone help?