Minimal test code

function test_sensor:on_activated()
  local s=sol.state.create()
  s:set_can_control_movement(false)
  s:set_can_control_direction(false)
  function s:on_started()
    local m=sol.movement.create("straight")
    m:set_angle(0)
    m:start(hero)
  end
  hero:start_state(s)
end

Detailed explanation

When i try to make the hero move towards a teletransporter in 'side' destinaton mode while in a custom state, it won't trigger if i disallow movement control using set_can_control_movement(false). Notes:

1. doing set_can_control_movement(true) won't make the movement itself trigger the TP but will let the user press the corresponding direction key to do it (as expected).
2. a movement started outside a custom state will trigger the TP regardless of any key press condition if the angle and sprite direction match the map side's.