Marketplace consumes max available CPU then settles to 35-40% CPU while app is idle

After the latest update, Minecraft consume 35-40% CPU while sitting in the Marketplace, in the background. Eventually, if left long enough, it appears to time out and return to the main menu.

Lenovo T450S
Core i7-5600U
Intel HD Graphics 5500
12GB RAM
Toshiba 512GB SSD

Plugged in - Power Profile set to Best Performance