Spit up

SL

My little guy has been spitting up quite a bit online after his evening bottles. It’s usually around the same time everyday. I have tried to feed less ounces more often to see if that would help and it doesn’t seem like it has. I feel like I have tried everything with no change. I’ve contemplated added some oatmeal/rice cereal to his bottle to see if that would help but he’s only 3 months and I’m not certain as to what bottle I would put it in, he doesn’t spit up after his bottle before bed and sleeps through the night. Any other mamas go through this? Is it a phase they go through or is it something else? TIA!