Discovery goes on forever

[SiemsSISC]

Hi. I'm running this library in an Electron app but the promise for discover() is never resolved. I've been able to trace it to: this._udp.close() never calling the callback cleanObj(). So, the promise just remains unsolved forever. The app seems to be working on my Macbook Air, but not on my main Windows 10 machine. What's really strange is that it does work in another project on my Windows 10 machine. The only difference between the two projects (code is the same) is that I'm running one directly via Node and the other via Electron.