6 mo suddenly refusing bottle

Dawn

So my baby girl turned 6 months old on the 4th of December. She's been getting solids since just under 5 months. For the past week she has now been on 3 meals per day.

She is breastfed but gets a bottle before bed (sometimes breastmilk sometimes formula). Out of no where, last night and tonight she has completely refused her bedtime bottle, but will breastfeed.

Wtf?! Is it because of solids, is it teething, is it comfort? So confused.