Browser-Captcha Dialog(reCaptchaV2) can get stuck when JD is hidden to tray while user solves captcha
1. Let JD open a reCaptchaV2 captcha (maybe disable auto-click).
2. Close JD to TRAY (minimizing it will not trigger this error!).
3. Solve the captcha in the open browser --> Browser-Captcha tab will auto-close
4. Open JD again - now you're stuck with an open reCaptchaV2 Captcha Dialog in JD.
There is absolutely no way to close that other than re-starting JD.
Stopping all downloads will not close that window either!
It is easily possible to get multiple captcha windows at the same time that are stuck like this!