Creality Ender 3 extruder nozzle zeros itself off and below bed

[EagleEyePrints]

So we don't know what happened, things were working fine and now every time we go to press the Auto-Home feature, the extruder nozzle now zeros itself off and below the bed.

We've tried playing around with some settings, but were at a wall as to what to do to fix this.

I've attached a pic of what the extruder does when we Auto-Home.

Thanks.