Occurs on PS5, have not tested on PS4.

After a prolonged game session (normally over an hour), or after driving in a car for a long distance the player will begin to notice performance issues; including buildings taking a while to render, aswell as a low framerate. The longer the player plays for and the more cities the player visits the lower the framerate becomes, until the player must close the game completely and reopen it to fix the issue.

All of this points towards an issue with regards to memory freeing, as the performance issues are rectified by closing the game which resets the memory, as well as the fact that the issue is triggered by long sessions or by the player driving to lots of cities and other built up areas in a car.