Yes, I can reproduce this on the demo.
No, it doesn't only happen at 640px. This is easy to check on your own computer monitor. I don't know how wide your monitor is, but I'm checking this on a MacBook Air 11". If I have the page stretched to full width then all data points will "pop up" the extra info when I hover over them (with one exception). However, the smaller the width (I used 640 px only as an example) the fewer of the data points that will pop-over.
There is a very clear patter where the data-points to not pop-over start at the far left of the map (West Coast of the U.S.). If I make the browser size very small (e.g. 640 px) then nothing will pop-up even from the East Coast of the U.S. (e.g. New York or Boston).
The one exception to this pattern is if someone is in a spot like Hawaii: not matter how wide the data point never pops-up with detailed info.
Do you see this same pattern? If not, it may be OS specific. I've tested, and get the same results, using Safari, Chrome and Firefox on the Mac.
No, it doesn't only happen at 640px. This is easy to check on your own computer monitor. I don't know how wide your monitor is, but I'm checking this on a MacBook Air 11". If I have the page stretched to full width then all data points will "pop up" the extra info when I hover over them (with one exception). However, the smaller the width (I used 640 px only as an example) the fewer of the data points that will pop-over.
There is a very clear patter where the data-points to not pop-over start at the far left of the map (West Coast of the U.S.). If I make the browser size very small (e.g. 640 px) then nothing will pop-up even from the East Coast of the U.S. (e.g. New York or Boston).
The one exception to this pattern is if someone is in a spot like Hawaii: not matter how wide the data point never pops-up with detailed info.
Do you see this same pattern? If not, it may be OS specific. I've tested, and get the same results, using Safari, Chrome and Firefox on the Mac.