So there's something in the code that calls a generic emoji to fill the spot, and the generic happens to be a beer mug. Then, further down in the code, the page is told to explicitly populate each instance of that emoji with a star instead.
And that 1/10th of a second is how long your computer takes to process the code the web site is giving you. Heh.
The code writers probably don't even know where in the code those two things happen, and can't be bothered to slog through and find them.
So you get to -- briefly -- see beer mugs on days when your computer graphics card is working harder/slower than normal.
Go Vols!