[Text to Image][Mac ARM M2] Blank or Empty Output with RuntimeWarning

👋 howdy, team; first thanks for the great app!

👻 After upgrading from [v1.7.4](https://github.com/divamgupta/diffusionbee-stable-diffusion-ui/releases/tag/1.7.4) to [v2.5.3](https://github.com/divamgupta/diffusionbee-stable-diffusion-ui/releases/tag/2.5.3) (also [v2.5.1](https://github.com/divamgupta/diffusionbee-stable-diffusion-ui/releases/tag/2.5.1)), I'm encountering issues on "Text to image" on non-default models ( `stabilityai_stable-diffusion-2-1`, `v2-1_768-ema-pruned` ) but not models ( `Default_SDB_0.1` (default), `Samaritan_3d_Cartoon_v1_s2` ) where the outputted image is always (blank, empty, black).

🙋‍♀️ I would expect this model to continue working agnostic to app version/upgrade. I also believe this is the main recommended version and would expect it to work out of the box.

🔬 Model `v2-1_768-ema-pruned` succeeds for me on v1.7.4 but not v2.5.x. My Mac is M2 Pro 32GB on Sequoia 15.3.1. To troubleshoot, I have ( uninstalled+reinstalled app, restarted computer, tested with all other apps closed, ensured no coinciding CPU/RAM strain ).

What appears to be coinciding non-sequential log errors during issue:
```
stable_diffusion/schedulers/karras_scheduler.py:129: RuntimeWarning: divide by zero encountered in log

stable_diffusion/stable_diffusion.py:565: RuntimeWarning: invalid value encountered in cast
```

Errors appear to slightly shift but symptoms remain when toggling "Advanced Options">Diffusion>Sampler from "karras" to anything else.

Examples on defaults with prompt "octopus" (with logs footnoted if erred as generated from fresh app start-up each time)
- (A) successful v1.7.4 with model `v2-1_768-ema-pruned` from file manually downloaded from [here](https://huggingface.co/stabilityai/stable-diffusion-2-1/blob/87bf41937cd89c35cd299cbbfe43a722ee70d598/v2-1_768-ema-pruned.ckpt) months ago
-
- (B) unsuccessful v2.5.3 with model `v2-1_768-ema-pruned` from same save location as working just above
- 
- (C) unsuccessful v2.5.3 with model `stabilityai_stable-diffusion-2-1` as installed today under "import models">"import from hugging face"
- 
- (D) successful v2.5.3 with model `Default_SDB_0.1` as installed today
- 
- (E) successful v2.5.3 with model `Samaritan_3d_Cartoon_v1_s2` as installed today under "Import Models">"Availble for download"
-