Yes! Something nice to watch out for! I got one amaryllis also with a bloomstalk outdoors in a container, did not expect it, been really bad with them leaving them out all winter long. So I am watching over it now as well, our hungry snails are lurking.
And this one indoors, just testing its growing endurance. I still do not know what triggers the bloom though, and with the non-draining container, I have been quite careful with watering and hardly any fertilizer to avoid root/leaf burn. But at least the aspect of knowing if it can endure this manner of growing it, the experiment works.