I have a MWDA and use a Note 4. It worked with Android 5.0.1. AT&T pushed 5.1.1 update and it stopped fully connecting.
I went to a Microsoft Store locally and their tech guys didn't have a clue. I called Microsoft and they said "they didn't have a department that supports this product. (MS is never going to gain on Apple in the phone area with this level of support)
I went to an AT&T Device Service Center and they were clueless. I called AT&T and the agent said she would escalate this to the appropriate group.
Probably will never hear from them.
I went to the Microsoft Site that supports this product. It only refers to Microsoft Products like the Surface relative to use of the product.
It doesn't address that this is a Miracast device and that 10's of millions of phones (primarily Samsung) are Miracast certified so anyone like myself could benefit.
MICROSOFT PUBLISHED AN UPDATE TO THE MWDA FIRMWARE ON 11-26-2015. FIRMWARE VERSION 1.3.8305
One needs a Window PC running 8.1 or above to download the update app from Microsoft.
Plug the adapter into the PC USB. Run the app, and it will allow the firmware to update on the adapter. (You can even rename the adapter with the app.)
Following the update Android 5.1.1 will connect again fully with the adapter.
I sure thousands of these adapters are being returned because of such poor support. It COULD BE a great product for Microsoft if they got their head out of the sand.
I hope this helps.