Lost param in in app browser: Facebook in app browser...

I have a case:
button share have param like [domain.com]/share?catid=1&product=2 
in Chrome is ok
BUT
in facebook in app, when click share button, param ?catid=1&product=2  will lost, link on facebook only have [domain.com]/share?
Please check and we will fix.
I think we should encodeURI component