setPermF broken

Building upon https://answers.launchpad.net/yade/+question/690691 and @stranskyjan and @robcaulk comments:

O.bodies.append(sphere((0,0,0),.1))
O.forces.setPermF(0,(1,0,0))
O.run(10,True)

print('Final position is:',O.bodies[0].state.pos,'vs (0,0,0) initially')
print('O.forces.f outputs',O.forces.f(0),'vs (1,0,0) expected')

tested with yadedaily = 20200513-38215bf85125bionic1

My observations (everything which is not Yes is a problem):

Question	j1	j X
Particle moves under setPermF ?	Yes	Sometimes yes (different than j1), sometimes not, depending on X for instance
O.forces.f gives back correct force ?	Yes	No, gives 0