LTspice XVII : bug in voltage source


I found a bug when simulating a voltage source with a sine function in transient analysis.
see the attached file.

a 100kHz sine function with 1mV of amplitude and 0V DC offset is properly simulated on a transient analysis with 100µs.
if one changes the DC offset voltage of the source to 10mV, it is still correct.
but if one runs the simulation with 100mV DC or 1V DC offset, it is completely a mess.

on the contrary, if one uses a second source to make the DC voltage separately, the simulation works.
then, it seems the problem comes from the voltage source model.

am I doing something wrong with the simulator or is it really a bug ?


best regards