External changes to image used for Image To Image are not shown

**Problem**

1. select an image for Image To Image
2. edit the image outside of DiffisionBee
3. select the same image again

or

1. select an image for Image To Image
2. edit the image outside of DiffisionBee
3. select another image
4. select the original image again

**Expected**
- Changed version of original image should be shown

**Actual**
- Changes to original image are not shown, maybe it is cached somehow?

**Workaround**
1. Rename the image file
2. Select the renamed image file
3. Changes are shown