why image src works for one and not the other?

I doubt if this is plugin related, otherwise it should happen to you as well.

I already cleared cache and used Ctrl+F5 to do a hard refresh and SHIFT + Reload

I can’t believe this is my browser issue and the class should not be added randomly anyway, right? why the class is not added when you or others visit the page? that doesn’t make sense, if it happens to me, I truly believe it also happens to others
??

let me make this clear again:

three images on https://webdesignstudiotoronto.com/web/test2/

image 1: from arvixe, placed in post content, you can see its code through view source. I cannot see it in Chrome and Firefox, it shows up in IE
image 2: same image from arvixe, placed in footer widget (Hosting Partner 1), after I disabled Adblock in FF, it shows up normally, it still doesn’t show up in Chrome, and no problem in IE
image 3: image from Bluehost, placed in footer widget (Hosting Partner 2), no problem in all three browsers

Yep, as I said, the class is visible to me, but it’s not preventing the images from showing up.

I just tested out adding that gif to a test site (using Twenty Fifteen and no plugins) – in a page – and it did not add that class.

Deactivating plugins is standard troubleshooting.

it still doesn’t show up in Chrome,

FWIW, Chrome can have a very sticky cache.

ok, I am deactivating plugins one by one and i will report the result here.

After deactivated all the plugins in the website, issue is the same as before.

Should I change theme now? this is driving me nut

Since it works in other browsers, I think it’s Chrome.

It is still NOT working here in both Firefox and Chrome

Try flushing the DNS on your computer –

https://www.whatsmydns.net/flush-dns.html

and restart your router and modem.

Still not showing after taking you suggestion

Can you do me a favor, I can start a GoToMeeting and invite you to remote into my computer and you can get more control on what’s going on here?

Thank you very much

Problem fixed!

In stead of using the picture from its source, I downloaded the picture and save it on my server and point to it there, now everything looks normal.

Thank you very much for your time troubleshooting with me, it is much appreciated

However, this is just a workaround, it still doesn’t fix the true and real cause of this issue, that being said, I still think wordpress could do something to prevent this from happening, as to whether it could be called a “bug”, I don’t know and have no interest now as this issue really cost me too much time.

Again thank you WPyogi for your time.

Glad to hear you fixed it :)! That’s not a bug or it would appear on LOTS of sites and be consistent for everyone viewing that page.