ControlNet sample image remains in 'memory' of SD

[MrJeJo]

I'm not able to reset the sample/pose image of ControlNet. When I use ControlNet to generate an image, the sample data is stored in 'memory' and I'm not able to reset it. I have to restart the webui cmd window to delete it.

Steps to reproduce:

1. Start the WebUI
2. Generate an image (without prompt, just default settings), it will generate a different image every time, as expected.
3. Fill in a prompt like 'a photo of a bird'
4. Use ControlNet to scribble a simple drawing of a bird.
5. Generate an image, it will generate a photo of a bird with guidance from the scribble, as expected.
6. Now reload the WebUI, all settings will be reset, as expected.
7. Generate an image (without prompt, just default settings, ControlNet is disabled), now the scribble of the bird will be present in all images and it remains in 'memory.

I think this is a bug, or I don't understand to reset ControlNet?

Cheers,

Jeff