K1C Bed mesh shows a big spike at the back

I have leveled my K1C as best I can and as you can see I managed to get it pretty level except for the strange spike that shows up at the back of the bed. It is not imaginary, as prints tend to have poor surface quality in that spot and tend to come off the bed also. I don’t know what is causing this and it is a big deviation, has anyone had this and been able to fix it?