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This line

<param name="use_sim_time" value="true"/>

in your launch file means that all nodes within the launch file (and all others started after the launch file has been run) try to use simulation time. This feature is intended mainly for simulation (see the Clock wiki page) and mis-using can lead to all sorts of problems. There's a good chance that removing that line will make things work (if you remove it, make sure you start new roscore, as otherwise the param stays on the parameter server).