Got a few incapacitated pregnant Alcapas around (Icesheet map), and either
1) They were giving birth (while incapacitated) or,
2) They were about to shed wool (while incapacitated)
This causes a flood of non-stop debug prompts and ALL colonists 'Standing' (shown on their status) around doing nothing or unable to do anything.
I manually removed the incapacitated state of the Alcapas from a save file and above problem didn't appear anymore. Sorry if this isn't very specific or detailed why the problem occurred. Thanks!
Looks like it's the same as : https://ludeon.com/forums/index.php?topic=28200.0
Thanks!