Multi standard_vtol are unstable in gazebo

when i simulate multi vtol typing “~/PX4-Autopilot./Tools/ -m standard_vtol”, they are unstable. They were shaking and spinnig. Of course, they aren’t armed.

But, In the same way, the multi-multicopter(iris=default) is stable.
What is problem?..

This is Terminal message.

@bbooggoo15 I have created a fix in Spawn at different height for multivehicle simulation by Jaeyoung-Lim · Pull Request #19063 · PX4/PX4-Autopilot · GitHub

Hopefully this fixes your problem!

wow !
Thank you so much.
i solved this problem thank to you.
Thnak you