img2img significantly different outputs with same settings (model instance problem?)

[sugoidesune]

Current Behavior

Even with the same settings & seed img2img always has significant randomness & changes in output. Occasionally output is the same as expected.

Problem

This behavior makes it extremely difficult to experiment with settings and see their effects. As it's impossible to attribute the changes to the settings or inherent randomness in the output.

Expectations

img2img generates consistently the same output with same input.

How to Replicate

After 2 days of experiments I think I traced it back to the model being loaded. If the img2img is generated on the same instance with the following message in the log
.. weights already loaded then the output is consistent with images generated prior.

If the im2img happens on 2 different model instances with the message
Ensuring enough disk space... Loading fine-tuned model in the log - the outputs are different.

Example:
*the differences are more pronounced at higher resolutions like 1024

Missing Leg	Big Face, 3 Ears