What's causing it is that you have not used any of the options to customize it for how you want to use it. It is set up for noobs who have small runtimes and can't find their way around after closing and re-opening.

Search the forum for "klingon toothpick" and read about the options.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)