Retweet button problem

Dear Support How could i repair moment with your app when i'm trying to retweet, but the button  like seems to be unclickable, you know what i mean. This is really sad that I need to reload my iphone to finelly retweet something because its not fast. I cant understand where is the problem, maybe reinstalling app could help? My mother have the same problem on her pad, she bought new and the problem is over. How and why i do not know.