Hello, my name is Rusty. What is the model number of the system?
Hi, I'm Carl and I will take over where you left off with Rusty. This sounds like an interference issue and wouldn't have anything to with the detector. The issue would be with the headset RF Circuit thinking it's receiving a vehicle alert when it's not. Check different areas of your location and ensure that nothing interfering. If everything looks good, replace the Headset and you should no longer see this issue.
If you need any clarification or additional help, please feel free to ask me.
Thank you for the additional information. I was not aware that you were using additional headsets. Is your detector Audio, Motion, or Audio/Motion based?