PX4 Simulation Stucks at Waiting for simulator to accept connection on TCP port

Hello, i am trying to run multiple vehicle simulation using 1031 (gazebo-classic plane_cam), but it stucks at:

INFO  [simulator_mavlink] Waiting for simulator to accept connection on TCP port 4561

I believe itโ€™s having trouble while trying to run gazebo classic. I can build one plane setup like: make px4_sitl gazebo-classic_plane_cam__ksql_airport with no issues

This is the run command that i use:

cd
cd PX4-Autopilot

gnome-terminal --tab -- sh -c "PX4_HOME_LAT=47.6225 PX4_HOME_LON=-122.3135 PX4_HOME_ALT=100 PX4_SYS_AUTOSTART=1031 PX4_GZ_MODEL_POSE="0,0" PX4_GAZEBO_MODEL="iris" ./build/px4_sitl_default/bin/px4 -i 1; bash"
sleep 10

gnome-terminal --tab -- sh -c "PX4_HOME_LAT=47.6225 PX4_HOME_LON=-122.3135 PX4_HOME_ALT=100 PX4_SYS_AUTOSTART=1031 PX4_GZ_MODEL_POSE="0,1" PX4_GAZEBO_MODEL="iris" ./build/px4_sitl_default/bin/px4 -i 2; bash"
sleep 10

gnome-terminal --tab -- sh -c "PX4_HOME_LAT=47.6225 PX4_HOME_LON=-122.3135 PX4_HOME_ALT=100 PX4_SYS_AUTOSTART=1031 PX4_GZ_MODEL_POSE="0,2" PX4_GAZEBO_MODEL="iris" ./build/px4_sitl_default/bin/px4 -i 3; bash"
sleep 10

gnome-terminal --tab -- sh -c "MicroXRCEAgent udp4 -p 8888; bash"