Unstable behaviour of QML's XMLHttpRequest in-case of disconnected data connection

I'm sending a HTTP GET request from QML with help of XMLHttpRequest. It seems that if underlying data connection gets closed for whatever reason the application can't recover and doesn't do valid HTTP requests until restarted. Screenshot from my test application attached.

Application should have automatically opened the data connection after it was closed. Or at least it should have used the new data connection when it was opened manually.

Qt Quick application as attachment.