growth spurt question

Dan 🇨🇦 • Proud dad of one, soon to be two!
My six month old started consuming a lot more formula about four days ago. About 1.5 times what she had been. Is it normal for that to just drop right of again as abruptly as it started? Suddenly this morning her  eating is right back down to a normal amount. This is my first baby so I have no point if reference.