Shutting my phone down

Every time I open this app, it literally shuts down my phone. Phone off, no turning it back on no matter if my battery was at 100%. I plug it back in, and it goes right back to the % I was at. Its so crazy. There are waaayyy to many glitches, the app freezes all the time when I am trying to open someones snap. I feel like if they dont fix this, Ill delete it. I wanted to blame it on Apple but now I think its Snapchat. They seriously need to fix this. Now ! I am so frustrated with my phone shutting down all of the time.

Bria56 about Snapchat, v10.4.2.0