In transit bug

So I'm certain this bug isn't news to anyone, e.g. that sometimes guests seem to be arriving at building but never actually do. I've narrowed down the trigger (or at least what I can tell to be the most common). If you switch locations (Sweetwater>Las Mudas for example) while a guest is moving towards a building but has yet to arrive, you will trigger the bug.

It seems to move the guest to the new location, where they'll enter a ghost state and arrive at the building which is no longer there. If you find them (which is fairly easy to spot given the desire icons), you can actually interact with them as if they had arrived at the building, despite the building itself showing them as having not yet arrived. Once the timer is up, they seem to return to the building.

Alternative solutions are force stopping the game or simply dismissing the guests. However, if you're mindful of when you travel to different locations, you can avoid the bug altogether by simply never triggering it. An easy indicator since I spend most of my idle time in sweet water: avoid traveling while the train is arriving. I've played for hours without triggering this bug, however I've noticed without the resets that the app seems to exhibit memory leak behaviour (e.g. after several hours the processing slows down, becomes choppy, etc).

tl;dr don't travel between locations while guests are walking to buildings and you'll never trigger the perpetually in-transit bug.