single post header position pushes post to right side

It looks like it's being caused by this CSS:

.page-header-image, 
.page-header-image-single {
    margin: 10px -25px 10px -25px;
}

Let me know :)

Hi Tom,
I have not added above css. Can you tell me what should I do?

This maybe added by Comet Cache HTML compressor. Try disabling it?

Hi Leo,
I disabled css compression and the bug still exists. Any way I do not use full width post headers and just wanted to inform you of the bug.
Thanks Tom and Leo,

The CSS is not added by GP so it's not a bug of GP. If it's not added by you then it's added by another plugin.

Here is the full CSS I see being added:

/*
Image Padding Css
*/
.post-image img {
    position: relative;
    vertical-align: middle
}

.post-image + .entry-header + .entry-content:after, 
.post-image + .entry-header + .entry-summary:after {
    clear: none;
}

.post-image-aligned-left .site-main .inside-article div.post-image {
    margin-top: 10px;
    margin-left: -25px;
    margin-bottom: 10px;
}

.post-image-aligned-right .site-main .inside-article div.post-image {
    margin-top: 10px;
    margin-right: -25px;
    margin-bottom: 10px;
}

.post-image-aligned-center .site-main .inside-article div.post-image {
    margin: 10px -25px 10px -25px;
}
.page-header-image, .page-header-image-single{
	margin: 10px -25px 10px -25px;
}

If you didn't add that, then try #1 on this page:
https://docs.generatepress.com/article/debugging-tips/

Thanks Leo,
Now I got what is the problem. In a post, Tom had wrote some css and I used that css. The following Post:
https://docs.generatepress.com/article/adjusting-the-featured-images/
I have changed -40 px to -25 px and maybe this has caused the problem.
Regards,

I adjusted the CSS according to content padding and now it is fine.
Thanks,

Also I deleted the above css mentioned by Tom,

Glad we could help!