Whilst on ATHR functions, Thrust lock has gone modification on CFM engines. It should have been there from the beginning. Following MSN numbers have this. MSN o138-0148, 0301-0335, 0249-0250, 0440, 9761 using ID button on the thrust lever will result in thrust lock. The thrust will not go to climb. Below from FCOM:
The Thrust Lock function is activated when the thrust levers are in the CL detent (or the MCT detent
with one engine out), and:
‐ The flight crew pushes the instinctive disconnect pb on the thrust levers, or
‐ The flight crew pushes the A/THR pb on the FCU, or
‐ The A/THR disconnects due to a failure