My stove oven is broke and that's how it be.
Mine's been blinking "18:88" for over the last 5 years now. It's a pain in the ass to set the clock on it so I gave up a looong time ago, and don't even notice it anymore. Besides there's already a clock on the wall, on the coffee maker, on the microwave, and one on my wrist so it just adds to the confusion.
Lke they say, "man with many clocks never knows what time it is."