Haiiiyo! I had a brief look and here are my comments:
- The (Bootstrap?) button group is causing the buttons to take inconsistent styles, with rounded edges for the first and last buttons
- I think having box shadow around the buttons would make them look better
Everything seem to work well otherwise and I didn’t find a combination of button clicks that would break it. 
I hope that helps!
Thank you so much. Yes the buttons are not good, I did used other combinations but no help, button will look like that and it’s because the react-bootstrap is in beta and will be released later.
Thanks a ton for having a look! 