Fixwd-wing auto take off problem

Hi, everyone.
I had assembeled fixed wing Z-84 and confidently made some flights in manual mode.
The next step I can’t overcome is auto takeoff in catapult mode.
I can’t understand what does not allow to pitch up after a launch was detected.
The vechicle takes off from catapult and then tends down. Help me, pls see my log.

https://logs.px4.io/plot_app?log=d7669f8f-5d63-431e-949a-dcb5bf9a8d3b