I was seeing much the same. But I just got my first raid on day 142, so thought I would report that raids are happening even on a new (mistland + 1 patch) world.

The raid itself was hilariously bad. I had just gotten back to base wet with the rest bonus expiring, so my stamina zeroed out straight away. But raid was a blob raid, and with an anti-poison potion their attacks didn't do much more than drain my already minimal stamina. Net result: both sides suffering more embarrassment than damage...