Not sure if this was a bug per se, but advancing story mode teleported me to Marind Bell. I was able to get back into the testing area, thankfully, after a bit of effort and sacrificing stored heat.
Bugs I've encountered so far at MP2:
1. Lorerootian Archer illusions show up as scouts with a starting vitality boost.
2. Elemental support starts as an egg, and needs age to upgrade.
3. Increase max vitality/value does not appear to work.
4. Most spells don't seem to work. I get error messages with the 'Bob' spell. Chase Wodin, however, does work - it got me back.