I really like it when I get it working. I had to utilize an old Android Sony Xperia phone to get Gateway to connect to my amp.
I found problems wtih the Sammsung J7, S7 and S9 phones that I prefer to use.
As I have a solution, I am not livid, but I do think your support is dodging the issues with Gateway. Hire someone from the SF Bay Area to remake the Application. I am sure you can find a slew of capable programmers. Just contract someone and fire your inhouse programmer(s) as they have let you, no they let your Users down.