AI traffic in MSFS loiter on the runway for an extended period of time both before starting their take-off roll and after landing. This, combined with the default MSFS ATC system causing aircraft to have inadequate separation on approach, leads to go-arounds.

Sadly, as FS Traffic relies on the simulator's core traffic engine to control the AI Traffic after it has been generated, we will need to wait for additional improvements in the core traffic engine before seeing an improvement in this area.