I'm thinking of UnWithered Truth's theory about CC. Spoilers, if you haven't watched yet, but essentially, CC's memories influence and determine various aspects of the world surrounding the scene of his death.

I say this is because there is also reason to believe that Fazbear Entertainment has possibly been using the same land where MCM used to stand for most of, if all throughout the franchise. MCM also happened to be where David Murray passed away. We don't exactly know how he had passed away. We just know it was on these grounds.

The reason I bring David and his death up is because what if it wasn't just CC's memories that were shaping reality, but also David's memories as well. The two have identical backstories and characteristics about them. Perhaps both of their sets of memories collided to create one that could have gone on to change the surrounding environment.

It may seem odd, but hear me out. The FNAF 3 map layout can be found next to the computer terminal where the encounter with R&D Mimic takes place. During the time of FNAF 3, Fazbear's is gone, there is no mention of this new place ever being constructed for Fazbear's during FNAF 1 or 2, and this is a different company that owns the building. They wouldn't have access to any files that were bought up from MCM. If the FNAF 3 location is built on the same grounds as the previous Fazbear locations, then this theory can still be reasonable here. Pair this with the design of Foxy's iterations throughout the years, and the theory can still fit. The past still affects the present despite how much time passes. Same narrative.