Baby has not gained weight during last month. Should I be worried..?

My baby born a little small %27 and grew to 50-60% in time and she has been steadily gaining and keeping at an average pace. However she hasn’t gain any weight since 7,5 months. She has been teething also during this time. She is exclusively breast fed and we started solids at 5,5 months. She eats 2 home cooked meals a day. She likes food but doesn’t eat much. She dropped nursing amount drastically after 4th-5th month but she was gaining well at the time. So back then I thought she became more efficient at it. Now, I think she just don’t eat enough and more importantly she doesn’t have much appetite. Is it summer? Is it teething? Or something else..? Since she is still at average percentile for weight and about %80-90 for height should I be worried? Or is it just temporary..?