Tiled Gallery linked images are restricted in size smaller than the original

### Impacted plugin

Jetpack

### Steps to Reproduce

Upload images 1600 px wide
Using them, create a tiled gallery
Display the post, and click on a thumbnail
Observe the displayed image size which will be limited to a smaller size

There is a support post that with more examples.
https://wordpress.org/support/topic/tiled-gallery-image-size-problem/

But, here are some relevant links:

This is where the problem can be seen:
https://www.testbed.biz/tiled-gallery-image-dimension-problem/

The images should display 1600 px wide

These two posts were manually fixed in the code editor, the file suffix _750x500 or _1024x768 were removed in the process. The clicked target images started displaying correctly:
https://www.keptlight.com/pawtuxet-village-in-infrared/
https://www.keptlight.com/larry-dunn-exhibit/

In the following post, there is a corrected tiled gallery followed by a new one I inserted a couple of days ago to demonstrate the problem. In the original post, published on Sept 4, 2021, there was no problem with any of the tiled galleries. The newly inserted one displays the clicked images smaller than they should be. Scroll down until you see the duplicate gallery. The first will function fine as it was created on the day of the publishing but the second one will manifest the problem.
https://www.keptlight.com/lightroom-local-adjustments-for-midtone-control/

On the KeptLight.com site, the theme has not changed for quite a while. It is Genesis Framework child theme called Mai Success by https://bizbudding.com/ The plugin engine was updated on 9/16/2921 which is two days after I started observing the problem on 9/14/2021 as I published the exhibit announcement post which manifested the problem for me for the first time. Jetpack was updated on 9/7/2021 which makes it the prime suspect! I rest my case! ;-)

### A clear and concise description of what you expected to happen.

I expected the displayed target images to be full size, 1600px wide screen width permitting.

### What actually happened

The target images displayed were considerably smaller and the file names all had a suffix added as explained above.

### Other information

_No response_

### Operating System

Windows 10

### OS Version

Latest available update

### Browser

Firefox, Microsoft Edge

### Browser Version(s)

92.0 and 94.0.992.31

Start by reproducing the tiled gallery behavior using the linked testbed and support examples, then compare a gallery whose target images work with one that adds the _750x500 or _1024x768 suffix. No source file, test, or entry point is named in the issue; done means clicked target images display at their full available width, including 1600px images.

Written by the indexing model from the issue text.