Man of Honour
Any chance of a picture of the carnage ?
I have had that happen a couple of times when the bed gets a certain amount out of level, and the bed leveling cant compensate. I would check everything around your Z axis is tight and there is no slop/backlash , then reset your bed leveling and run though a manual level with the slidey paper method. Also , apologies of this is teaching you to suck eggs , but make sure the bed has been up to temperature for at least 5 minutes before leveling.
I have had that happen a couple of times when the bed gets a certain amount out of level, and the bed leveling cant compensate. I would check everything around your Z axis is tight and there is no slop/backlash , then reset your bed leveling and run though a manual level with the slidey paper method. Also , apologies of this is teaching you to suck eggs , but make sure the bed has been up to temperature for at least 5 minutes before leveling.