I tried to change the physics engine in a simulation using kilobots from dynamics2d to pointmass3d to study a case where the robots would not have any collision. I was using the last version of ARGoS, beta59. While comparing both physics engines, dynamics2d worked fine as expected but with pointmass3d, the kilobots were barely moving. After trying multiple configurations, I decided to reinstall ARGoS cleanly from the compiled binaries but this bug subsisted. Then, I reinstalled an older version of ARGoS, beta56 and the bug disappeared with the kilobots moving at a normal speed when using pointmass3d.
It seems to me that between these two versions of ARGoS, there may have been a change done to the pointmass3d physics engine that caused the bug with the kilobots ?