Odd behavior with StumbleUpon

[northrop]

I've noticed this twice today, and I'm not sure how or why this is happening as I am unable to replicate this.

This is while using Chrome Version 60.0.3112.101 with StumbleUpon v.11.304

Upon opening this thread, a StumbleUpon pop-up button shows up within the text window, this is while the StumbleUpon add-on itself is turned off.

The second time this happened the ad in the top right corner was for Rackspace:

Spoiler: ad link

https://adclick.g.doubleclick.net/p...ws-kywd&utm_content=ittakestime&dclid=%edclid!

However, refreshing the thread or opening it for the second time, makes the StumbleUpon button disappear even if the same ad shows up again, which leads me to believe it's not the ad that triggers it, but I have no idea what else it could be.

 

[FrgMstr]

Dunno what to tell you about that. Extensions do crazy stuff. I will look for others with issues.

 

[michalrz]

Where, in the text, did the stumbleicon appear? Bottom left of the editor? Shouldn't there be [H] icons there? Asking because it reminds me of a very unlikely cache hit.
Either there was something in the text that shared a cache id with the stumbleupon icon, or the [H] webpage itself was loaded partially from your cache.
Just an idea.