Massive difference between global and hot spot temps on my 9070 XT

I'm seeing massive differences between the global and hotspot temps on my XFX Mercury 9070 XT. I believe this is to do with a improperly spread paste. It happens every time any rendering of any kind happens. The screenshots are from when I was in game on R6 and Delta Force.

My question is, what should I do? Is this warranty or return due to defect worthy?