UICollectionViewCell中的UILabel有时大小不正确

I made a UI for displaying interests in a tag format using UICollectionView. Users select interests from a list and they get displayed as a UICollectionViewCell. Each cell contains a UILabel with the interest next to a UIButton with an "X" to delete the interest. It works mostly fine, but sometimes when adding or removing interests some of them layout improperly, as I highlighted in the image below:I made a UI for displaying interests in a tag f