Glitch?

Whenever I try to use a filter the app stops. I want to get cool backgrounds and filters but my video stops and it glitches out and then doesnt let me finish. And twice it let my finish and then it didnt go through! And then when I think it works the app randomly closes. I see super cool things made by solo on musical.ly and I really want to do that. Im not saying this to encourage people (idk if thats the right word) to not get this app. Idk how much people have this problem but I do. And most of the users dont have this problem I totally recommend you to get this app. But Im just trying to get someones attention to see if they can help. Anyways, from the videos I see this app seems fabulous. I just want some help on how I can fix this problem. Ive tried deleting and downloading the app again but its exactly the same. Three stars because of my problem but overall I love what this app can do.

JyayJ about Solo Selfie, v2.1.1