Double XP Token ?

Today when I finished a game in Infinity Slayer I thought I’ll get about 3000 - 3500 XP as always (with Fast-Track), but there is a window appeared in the screen saying “Double XP Token” and something else I couldn’t read it, than I’ve got 6550 XP !

Is there a double XP weekend or something like this ?

they gave the xp token to people who lost xp during the launch when your double xp was being used when you reached the cap

That’s wierd, I used only one double XP code that someone in this forum gave it to me, and I played all the 3 games of it and got all my double XP !