Flashing window content can cause harm

I've opened an issue and I've been writing a comment into it. I also added a Label on it, then I've been re-reading my comment while having the mouse cursor above "Comment & close issue" button. A tick of the second before I clicked that button the page updated with a note that I added the label there, but I already pressed the mouse button, thus it did what had been under the cursor now. It was quite scary, because it opened a new tab in my browser and I didn't know whether my other changes had been lost or what happened at all, because I've been about to close the issue, not to open a new tab.

I guess I cannot set for my user to have the issue pages static and updated only after I want, not when it wants it, right? I do not like surprises, and this had been a big one.

I also do not want "live pages" due to bandwidth usage, I've better tasks to use my limited bandwidth than issue pages (which I can have opened several at one moment).