1 year old doesn’t seems to eat well

Hi mummies, don’t know what’s wrong with my 1 year old boy yesterday during lunch and dinner. When we offers him lunch and dinner , the first few mouth he seems to enjoy and eat but the next moment, the food keeps sitting inside his mouth. He doesn’t want to bite or swallow. Is it due to teething? Really unsure of the reasons. Tried all ways to feed him but doesn’t work. Other days same pattern, but when we distract him with toys he still be able to finish at least half bowl. At first tot he is sick of eating the same food but we have been introducing new style of cooking and food for lunch but doesn’t improve much :(:(