[Qt-creator] 12GB for Creator? (OSX)

[Jason H]

Creator was running fine, but none of my OS was. I launched Activity monitor, and it was taking up 12GB. I can type fast, but I don't type that much in a week, so I don't think it's undo history. 
I restarted Creator and it takes 94MB.
Loaded the same project as under 12GB, 154 MB.

Creator 3.6.0, Based on Qt 5.6.

Is this fixed or am I doing something wrong?