Software has dependencies everywhere. If you think you know how it is all hooked up together and everything must be logical you probably don't. I.e. Sore foot? Must be a muscle! Then you find out it is your brain.
Even Sonar is liable to bugs that Microsoft may supply when it is built and compiled, and as Bob duly pointed out, it could be a programming error, and it could actually be a Microsoft programming error that may be corrected via windows update or updating software elsewhere. Yes it happens.... and yes it could be Sonar. But you have to rule it out.