Bandai Namco Entertainment has nothing to do with this game. Oasis games just bought license from them and they are featured/mentioned in every official web page. Well, they are part of this game but only in license phase/part or w/e you want to call it. In other words, they can't do anything with servers, game or it's functions.
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If there is something you want to report, you can contact me since I'm in charge of Customer service and I'm taking care of all bugs, server problems, payment problems etc.
Back to your problem - I'm sorry you are experiencing this problem. We want to make sure our servers are stable and we are improving them. We will check this. If you get this problem again, please try to use browser version and let me know if you got this problem while using browser too.