juniperus chinesis

Dear Everyone, I would need help to identify what's killing my tree. I purchased this tree roughly a year ago and left it untouched for the most part of that time to first observe it during a whole growing season. The tree was doing GREAT and had vibrant color. When the tree start growing again...

We've had mental weather here in Sweden lately, with the temperatures going from -2 to +25c.. Most of my garden seems very confused as to what season it is, and my bonsai trees have been hit the worst. I've been trying to rule out what could possibly be wrong with this juniper. Is this root rot...