Xiaomi MI mix 3 screen burn?

Picked up a lightly used xiaomi mi mix 3, went through the initial setup.
Opted to use gestures instead of the on-screen navigation.
Once I turned off the on screen navigation I noticed it was burned into the screen on light wallpapers you can see it but on dark you cannot!
Does anyone know if there is a fix or is this a hardware issue?
I reached out to XIAOMI but am waiting for a response. Figured I'd ask on here to see if anyone has any insight.
Thanks in advance if anyone wants to give any suggestions.