Created attachment 300197 [details]
This reminds me a couple of bugs I was seeing on Chrome like http://crbug.com/422670 and http://crbug.com/519686 but unfortunately, unlike them, this doesn't occur.consistently so might be harder to confirm and reproduce but perhaps patches associated with that bugs would be helpful.
Steps to reorpo:
The left box which has blue border, sometimes shows the tabs and sometimes not.
Consistent rendering of tabs.
I cannot reproduce this using Safari 10.1 beta, after a dozen reloads.
/left box/right box/ :)
Actually what helps to reproduce this is to every time open a new page, like
(change the number at the end of URL)
With above, first opening the link with &1 and change it to &2, now I am able to reproduce it consistently. But I hope this wouldn't be because of limited Internet speed I have. Please let me known if you were able to repro this with these instructions or not so I would seek another way for it.
This just did reproduce for me (the first time I opened the page).
Hey, I wonder if this could be prioritize? This is very annoying for developers while browsing sources I guess.
Not just "I guess" but I am seeing this on the daily basis and I guess other developers also do, of course I know WebKit is an open source project and I can contribute the fix myself which I can not as I don't have enough facilities to build and fix, I meant just a little more attention would be appreciated :)