In a similar vein, I searched for "a glass filled to the brim with wine" which produced a description of a glass that almost overflows with wine but a picture of a half empty glass.

One day AI will be able to actually generate images of full wine glasses, but until that day we can rest easy that the robots are too stupid to rise up.

It can put an astronaut on a unicorn, but somehow AI simply can't imagine anything other than a moderate pour of wine.