iTunes 12.2.0.145 can't pause download of iOS 8.4
I've just installed iTunes 12.2.0.145, and plan to download iOS 8.4 for my iPhone soon, but before I commit to downloading this 1.79 GB download, I tested that I could pause and resume, because my internet is slow and has been unreliable lately.
When I start the download, it starts ok.
When I pause the download, the amount downloaded immediately resets to ZERO, forcing me to start from the beginning.
Here's a demonstration of the problem:
iPhone 5s, iOS 8.4, Running Windows 8.1 64-bit