Browsers not in sync or it the game?

[peasblossom]

I'm not asking for myself here, but has anyone any ideas about what on earth might be happening if, when you play Heardles* you get different tunes on different browsers/devices and they only sync if you repeatedly clear the cookies? It just sounds like the most extraordinary  hassle, and huge puzzle.

*It's an online game that plays a short burst of a song which you have 6 goes to guess. There are different decades and themes.

[Simon]

I've had this before, and yes, I think it largely depends on the cookies, as the game 'remembers' the last one you played. 

[peasblossom]

But they have to do this repeatedly, and well after the next game has refreshed/switched to the next one.