[Butz]

Indeed. It's happening to me now too. Except it's warping me back to the shop at Hotaru each time. It's a bit of a pain, since there are reasons to go to Eastern Main once in a while.

e: More specifically, it is the area surrounded in blue flags on the map which is doing it, so technically, heading east isn't a problem. Heading into that area from any direction is.

e2: Upon further inspection, it doesn't seem to be warping me to my last restart position either. In fact, it's warping me to the entrance of the last building I exited.