CUNY Academic Commons

Info about available themes is loaded into a JS variable at the time of page initialization. It's not fetched by AJAX.

It's hard to tell for sure without more information about what you were seeing, but from the number 20 I'm guessing that some other script on the page was breaking WP's theme "pagination". (It's not "pagination" in the sense that you go to a second page; but themes.php initializes the first 20 themes into the theme list at the time of page load, and does the next 20 once you've scrolled far enough.) You don't mention whether a soft refresh was attempted but didn't work, but if that's the case, it could be that the browser had previously cached a version of a plugin script (or something) that was causing a JS error on the page, which was late enough to allow the initial rendering of themes, but prevented the pagination method from running. A hard refresh would've cleared this cached broken script.

If this problem recurs, please collect debug information from the JavaScript console https://webmasters.stackexchange.com/questions/8525/how-do-i-open-the-javascript-console-in-different-browsers. If you're able to reliably trigger the error on a certain site, or by performing a certain series of actions, please share those details here.

A soft refresh works, but I noticed it only loads an additional 20 themes (I have to refresh when I scroll down to the bottom of the first 20, then scroll down and refresh again when those are loaded).

Here's the JS error

jquery.js?ver=1.12.4-1.13.6:3 [Violation] Added non-passive event listener to a scroll-blocking 'touchmove' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952

Thanks, Jessica. That error message doesn't seem likely to be related.

Could you please give me a URL to see if I can reproduce myself?

It's on https://jtds.commons.gc.cuny.edu/wp-admin/themes.php. Do I need to add you as an administrator, or can you access it?

Nope, no need to add me.

I'm not able to reproduce on my machines. The issue could be linked to your specific setup. Could you please visit https://supportdetails.com/, then Export PDF and upload the pdf here?

Thanks, Jessica. I'm still not seeing the error, on a machine with a similar configuration. I also don't see the console error you've mentioned. This suggests it's either linked to your account, or tied to some extension or browser customization you're running.

Could you test on another machine, or on another browser - or even a private/incognito window - to see if the same behavior persists?

Also, could you confirm that you are going to Dashboard > Appearance, and scrolling down the page, and you reach the bottom after the first 20 alphabetical themes?

When I didn't initially see any flags, I changed the JS console settings in Chrome to "Verbose" under "All Levels" to see the error. I think you're right that it is an extension that is causing the problem. I still have to refresh when I open a new session on both PC and Mac, but not in incognito. I will try to figure out which extension is causing the problem, but it's probably not a common issue.

Thanks for investigating, Jessica!