MC down script is too slow to block MC_L when the cavity goes out of lock. As a result the loop strongly kicks MC2. We decided to make a threshold inside MCS model on MC TRANS that will block MC_L during lock loss. This is a lower threshold. Upper threshold can be slow and is implemented inside MC up script.
Fast threshold can be set inside MC2 POS. I did not correct MC2 top level medm screen as it is the same for all core optics.
Note: Fast trigger will also block ALS signal if MC loose lock.