Annoying pop up window

[FireMan]

And here I thought I was goin to be history! 🕶

[Randy-Phx]

I have it too but it doesn’t seem to interfere with reading posts. iPhone 8+

[Donw]

I can reproduce it using this procedure:
Click on a post link and then click on the link again before the page has loaded. Found it by clicking on a red post link. The page was slow to load so I clicked the link again. raywjohnson

[MBMorgan]

Another attempt using Donw ‘s reproducible method. Still no error here.

I hate bugs like this ...

[mnavarre]

I've had the same behavior happen on other vBulletin forums running 5.5.x with Safari 13.1 on macOS 10.14 and 10.15 and in Safari on iOS 13.4.1. Does not happen in Chrome or Firefox. I think it's a bug in vBulletin + WebKit.