I wonder if it's a race condition or something bugged about the game's condition/status ticks. I didn't have any problems with multiple Passive Growth crystals, and even tried equipping them in similar (first crystal slot only) and different (first slot Leah-second slot Valorie-third slot Sanu) equipment slots to see if I could get the bug to occur on my copy.
I was prompted how to solve this problem.
To begin with, get out of the sewer and climb up the stairs, walk past the dancer and go to the rabbit that stands near the casino, enter it, then go to the concierge's mimic and go to the left wall, there will be a door. Log in to it, then follow the instructions of the game.
There does seem to be an issue on the bridge to the Sunken Temple west of Lakeview with Gremory's introduction CG in the .410 version. It's a bit roundabout but my solution was to save right before the area where the issue occurs, (assuming you're playing the Patreon version) copy that save and move it over to the public release of the game and walk through that scene and into the Temple, save again and move that file back to the version you were playing and so far as I've seen it never came up as an issue again.
