Animation ends prematurely

[CrazyTim]

Suspect it happens when switching to another tab and back again. Perhaps Chrome is optimising behind the scenes and this throws of the timer?

[CrazyTim]

Likely due to timers not firing if the browser tab is inactive.

See: https://stackoverflow.com/questions/5927284/how-can-i-make-setinterval-also-work-when-a-tab-is-inactive-in-chrome