I have to PCs with Ubunto 20.04, one running Gazebo 11.2 and the other 11.3. Both are using the same models and worlds.

In 11.3 I cannot get a GPS fix using the PX4 (PX4-Autopilot) Iris models with additional sensor e.g. IRLOCK or LIDAR. In 11.2 everything works.I have to PCs with Ubunto 20.04, one running Gazebo 11.2 and the other 11.3. Both are using the same models.

The pose of the GPS, seems to have a huge negative value in Z when running 11.3. But not in 11.2.

Anyone with similar issues?

How can I downgrade from 11.3? I have tried without success (just says it cannot find the version):

sudo apt-get install gazebo11=11.2.0-1~focal

Thanks!