Reverse Cycling?

I’m pretty sure my almost 3 month old has been reverse cycling for a few weeks now. He is breastfed (I don’t make enough milk due to issues early on) and supplemented. Problem is he won’t take any formula during the day. He’ll feed every 2.5 to 3 hours during the day and refuse a bottle, but then he’ll take 3-4 oz bottles at 6:30pm, 12am, & 4:30am on top of breastfeeding. Should I be worried about this? Can it affect him sleeping through the night?