Are you changing sampler and resolution every time you start automatic1111?

Edit the ui-config.json file (main dir) in a text editior (make a backup first).

Here are my settings:

Sampler:

"txt2img/Sampling method/value": "DPM++ 2M SDE Karras",

steps

"txt2img/Sampling steps/value": 30,

resolution

"txt2img/Width/value": 832,

"txt2img/Height/value": 1216,

or

"txt2img/Width/value": 512,

"txt2img/Height/value": 768,

Hires

"txt2img/Hires. fix/value": true,

"txt2img/Upscaler/value": "4x_NMKD-Siax_200k",

"txt2img/Hires steps/value": 12,

"txt2img/Denoising strength/value": 0.4,

CFG

"txt2img/CFG Scale/value": 5,