Google Crawling Non-Existent @2x Image URLs (Created by Plugin or Theme?)

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I’ve run into a frustrating issue with Googlebot crawling a large number of non-existent @2x image URLs like this one:

/[email protected]

These pics don't exist on my server, but Google is still trying to crawl them, and it shows a ton of 404s and inflating my crawl budget.

Here’s some info:

I'm using a custom Genesis child theme (I didn't update or change anything recently).

My active plugins (that my research shows could be causing the issue):

• EWWW Image Optimizer

• Jetpack Boost

• WP-Optimize

I have WebP conversion enabled in EWWW.

Some of the URLs like the @2x ones are appearing in Search Console crawl stats and are flagged under "Crawl request: Not found".

When inspecting the affected pages in Search Console, I get:

"Page is not indexed: URL is unknown to Google. No referring sitemaps detected"

I did some research and found out I could disallow those images. So I added this to my robots.txt file:

User-agent: *
Disallow: /*@2x.jpg$
Disallow: /*@2x.png$

I need help figuring out what code or plugin is creating those @2x URLs and how I can stop it.

Also, is it okay to disallow @2x via my robots.txt file or is there a better way to do this?

Thanks so much in advance.