Only thing I would say is don't worry or make it an issue, it may be LO has a sore mouth and milk is more soothing! My DS now 26 months can go right of good when teeth are nothing him, last month all he wanted was milk in his cup and only a couple of spoons of breaki, I noticed a molar peeping and after a few days he was back on food!
Just keep offering the food, maybe try a fork my DS loved the novelty of one!
Are you offering milk in a cup yet?x