Share locker and the Facebook inapp browser

I'm testing a share lock (similar to OnePress Social Locker) on a site that gets decent facebook mobile traffic.

Interesting find. Desktop users are sharing without a problem but mobile users, specifically those that open the site in the inapp browser seem to be having trouble. I'm tracking the clicks on the share locker, 90%+ of visitors who are not using the inapp browser are sharing. Under 25% of those using the inapp browser are sharing after pressing the share button.

Thought it might have been the code at first and something being blocked but then checked using a few different phones, older and the latest versions of Facebook everything works.

Thoughts?

These inapp browser users located in the same country as you? Didn't you try to check that pattern?

This wont be sucess bcoz brower blocks all things