Diode VF & VarResistor

Sorry for all the feedback in a short time, don't want to clutter the forum...
 
.      (I posted this yesterday but it seem to dissappear?)
1. When playing with a diode in circuit I notice the Vf behavior -  With increase current Vf increase is significant. eg. 5A = 3.7V, at 0A Vf is at set value.
Is this intended for simulation stability?
It is the similar for Zener mode.
For workaround I can place several diode in parallel.

2. In the component VarResistor  with step size = 1 is great for a 1k or 10K resistor but for 5 or 10 ohms the step size is a large for 1ohm is no step.
(but with Potentiometer has a small step with low ohms)

I also notice negative values can be entered/adjust in max/min value of VarResistor

Sorry for all the feedback in a short time, don't want to clutter the forum...

Don't worry. During summer there is little activity here.
And bug reprots are essential for this project, so any feedback is very apreciated.

1. When playing with a diode in circuit I notice the Vf behavior -  With increase current Vf increase is significant. eg. 5A = 3.7V, at 0A Vf is at set value.
Is this intended for simulation stability?
It is the similar for Zener mode.
For workaround I can place several diode in parallel.

Diode has a default internal resistance of 0.6 ohm.
I think this value should be editable, it is for Leds but not for diodes.

2. In the component VarResistor  with step size = 1 is great for a 1k or 10K resistor but for 5 or 10 ohms the step size is a large for 1ohm is no step.
(but with Potentiometer has a small step with low ohms)

You are right, this must be solved.

I also notice negative values can be entered/adjust in max/min value of VarResistor

Yes, another bug here.

Thanks for reporting.