Thank you. There is at least one problem: Current fault limit is only 10mA higher than your peak current setting, so no wonder you easily get overcurrent faults. Try setting fault limit to at least 13000mA.

If this doesn't solve the problem, then please also do set of step tests while one or more of following additional signals are selected:
-Torque target value
-Torque achieved value
-Output voltage amplitude

This will help seeing what drive does during the odd behavior.