Not so important, maybe not worth fixing. But anyway, if it takes long before the promise gets resolved, because the sever is slow — then, when I continue typing, the "Loading..." box doesn't go away, although I've typed "@username and more other stuff afterwards" already. — But in reality, the server will "always" be fast & this won't happen :- )
Discussion: https://github.com/webscopeio/react-textarea-autocomplete/issues/33