Investigate ios facebook users cannot redirect back to likecoin button after login

[williamchong]

device: ios13 facebook inapp browser
When users click a likecoin button in facebook inapp browser, sometimes after login they were not redirected to the original likecoin button screen, but in fact was redirected to /in which shows liker land app installtion guide.

Expected: Users should be redirected back to likecoin button and automatically click like after sign in.