I'm testing a x64 windows build on a Windows 10 (1903) VM running in Fusion 11.1.0 on macOS 10.14.5. I see the problem both as a built 64 bit exe as well as when remote debugging from mac to Windows. When i click the button, the app starts using 50% CPU (on a 4 cpu system) and gets the "Not Responding" message from windows OS. My router shows little or no data is being downloaded. Letting it run for 10+ minutes - it never recovers.
A 64 bit mac build of the same project fails (it throws an error due to app transport security). But if you add an info.plist file to the project that contains:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<!-- Include to allow all connections; avoid if possible -->
Then it does work. On MacOS it uses more CPU than I'd like (50% ish) but that's probably a different issue reported here: Feedback Case #55709
Here's version 4 which has the Info.plist and explicit 64 bit build settings for both platforms - otherwise identical to v 3.