Everything you mention of course makes sense, heat and drought in particular, it's very much an alpine growing in cool, soggy places - usually in partial shade.
That said, for your next generation, and for others who notice flowering stems developing, I'd still recommend removing it. Seeds are fairly cheap and easily available from many of the seed lists, and they keep surprisingly well for a Gentianaceae, the main issue is the incredibly long time it needs to actually produce a few flowers.