So apparently, BDSP are so faithful to the originals that they've brought back some of the old glitches from DPP, like the void glitches with Darkrai and Shaymin.
There's also a severe softlock issue with the puzzle in Snowpoint gym if you leave the autosave on (basically, it's entirely possible to trap yourself within the snowballs. One poor sod managed to get himself softlocked in there because
the game autosaved as soon as he got stuck. I think the issue existed in DPP, but at least you could manually save before that happened.) Fortunately, there seems to be a secret menu on the title screen where you can load a backup save, but this implies the devs knew some people would accidentally softlock themselves at certain points.