MIS_TAKEOFF_ALT=0.5m, but the drone is NOT holding position there, why?

I have set MIS_TAKEOFF_ALT = 0.5, but it didn’t stop / hover.

Here is the log: https://logs.px4.io/plot_app?log=17317e6c-0fb9-47be-898d-a53eeb9b7b8c