from what you have written here I don't even know what version of webui you are using
if you want us to have a chance to fixing stuff like this you need to at least provide the basic information that we asked for

"Platform": "Windows-10-10.0.22631-SP0",
"Python": "3.10.6",
"Version": "v1.9.4",
"Commit": "feee37d75f1b168768014e4634dcb156ee649c05",
"Commandline": [
"launch.py",
"--use-cpu",
"all",
"--precision",
"full",
"--no-half",
"--skip-torch-cuda-test"
],

It seems to me that the Hires.fix isn't just an Upscaler. I mean that this bug could be explained only by assuming that other complex calculations besides image upscaling take place when Hires.fix is running. Even if this is the case, you need to change the description of this operation on the Hires.fix tab. Because, right now from the description, it seems that this tab just starts the Upscaler after the image is generated.
I'm making this assumption based on the fact that upscaling an image in Extras tab with the same settings requires almost no RAM.
Regarding providing information, I believe the information you are requesting is excessive and not reasonable given my particular situation. The file you are requesting contains a lot of personal data that can't help you in any way to solve the problem. I've already pointed out that:

• The issue exists on a clean installation of webui
• The issue exists in the current version of the webui

Massive PEBKAC.

Massive PEBKAC.

If this is even the case, the problem is that the UI is misleading.

From the description as well as the controls of this tab, the user gets the feeling that this feature only activates the Upscaler.

The only problem here is that you downloaded a software that has been out for a long time and decided to report something as a software issue when you obviously haven't read a single letter from the documentation, alerting the devs to a potential issue.

https://github.com/AUTOMATIC1111/stable-diffusion-webui/wiki/Features#hires-fix

Don't bloat the software's Issues page with your personal problems of reading comprehension, this is used to track legitimate problems.