I was moving the tools storage to a different location with click and drag when the “new colonists arrived” message popped up before I could release the mouse to place it in the new location.
This caused my tool storage to completely disappear, never to be seen again. Reloading the game did not help.
That happened to me too! I forgot about it, until I read this.
Also happened to me while moving a farming patch of soil. Trader arrived.
We have a big furniture placement overhaul planned (which would also prohibit deletion of infested plants), but not sure if it’ll be ready for A8.
We’ll try our best 
I can only speak for myself, but reporting a bug means just letting you guys know what happened. It doesn’t mean I expect a solution the very next update.