When we integrated some Matrix functionality with Homesnap in the Summer of 2019 (edit listings, access saved searches and listing carts, invite contacts, etc.), it was discovered that there are some issues for users on Android-based devices.
As of October, the ability for an agent to invite their Matrix contacts to Homesnap is not available for Android users. This is not an issue for iPhone users.
Homesnap's engineers are aware of the issue and are working on a resolution (though there is currently no ETA for the fix).