Since my result is different from Marc's result, I did calculation again. I found a mistake in my calculation of ABCD matrixs.

From the calculation point of view, Marc's result is correct.

I will check in actual case to see if the calculation aggres with calculation or not. As I have already mentioned in the meeting, we can see the reflected beam is shaking while the filter cavity is locking. So if they don't agree with the actual case, I think the discrepancy comes from the beam shaking.