ROS time starts at 90
I am working with ROS Melodic on Ubuntu 18.04, using Gazebo as virtualizer and a Turtlebot.
So far, with every simulation I ran, I used the so-called turtlebot_house.world
that came with installing the ROBOTIS Turtlebot3 simulations package.
When I use that world, ROS time correctely starts at 0.00 secs.
Recently, I defined my own world using the Gazebo world editor tool as described in this video. When I launch a simulation in my world, ROS time starts at approx 90.00 secs: I can see this in the stdout shell and also getting the time inside my scripts.
I have no clue in what's wrong nor what to do to provide further details. The same issue also happens across PCs.