Graph doesn't load when tab is not focusing

[ragmar]

Expected behaviour

See the complete graph

Actual behaviour

Graph is failing to initialize, and the console is thorwing the error Uncaught TypeError: Cannot read property 'pos' of undefined

Live demo with steps to reproduce

http://jsfiddle.net/ragmar/64fgb5m3/

• Open this fiddle in a new browser tab.
• Change the browser tab to any other, except the fiddle just opened.
• Right click the fiddle browser tab, and click reload page.
• Wait for it to load without focusing the browser tab.
• Open the fiddle browser tab.
• Graph does not appear, error in console

All this also work if you refresh and change the browser tab while the page is loading

NOTE: No error happen if you have opening the browser tab and wait for it to load, you need to change the browser tab

Product version

Highcharts 7.0.2 and drilldown 7.0.2

Affected browser(s)

IE, Chrome, Firefox, Edge

[KacperMadej]

Hi @ragmar

Thank you for reporting about the problem.
It's already resolved on master branch (next release candidate).
See more info in the main thread - #7872
Closing this issue as a duplicate.