squencer camera setting (focal length, focus distance) keep changing

Like I said on question title.

Sequencer camera setting like focal length, and focus distance keep changing even
though I set the key.

Everytime I render, the setting I did is changed.

I constantly experienced this issue since UE 4, and I don’t know why…

Are there anyones having hard time with this situation?

Thanks.

First we need some details:
Does the camera move or is/was it tracked via livelink?
Is the camera possessable or spawnable?
How does the FIZ change? Does it change to a value that lookes familiar or is it random?
The FIZ lookes good in Seqencer but as soon as you render via render queue it changes?