Mavros topics on ROS giving super high and fake publish frequencies

I’ve managed to connect PX4 and ROS1 using Mavros, but the topics are for some reason having super high artificial publish rates, over 1000 Hz !

I’m using up-to-date PX4 and ROS Noetic on Ubuntu 20.04, does anyone know what might be the problem?

Here’s an image of RQT topic monitor to give an idea: