Okay, so on Day 2 I decided to go sneak into Tyr. I figured I'd go the back route- climb down the cliff and then pick open the lock to the door, to see what happens.
I did just that and... it acts just as normal! Even when you leave out the front door, the gate appears locked and you get a lecture about not being able to get in due to blahblahissues I forgot what she said.
I'm getting pretty good at this! This reminds me of how fastidious I can be with adventure games.
Try using the Baba Yaga plant on yourself before she's told you to go get it in QFG 1 and you'll see what I mean.
Definite bug there.