So this wallet have a bug?
In the past I have problems with others services(no btc related) with this SMS thing and well, I'll skip GA for now...
Not quite. They're saying the issue arose from a problem with the provider of their SMS provider.
Small update: Apparently the issue is not at our SMS provider but their own provider and they have pushed the request to fix this issue upstream to their own provider.
Anyway, @OP, glad this was resolved, though their support response is quite lacking. lol. Good thing you managed to find them at github.
* Oh, they've also advised to enable multiple 2fa options. (This is the reason I'm quite hesitant relying on SMS as 2fa. Unreliable.