Party Time DLC bus not arriving at level 5

[Caley Bannen]

Everything seemed to be working at level 1 and 2, but I upgraded 3 and 4 at the same time and now the bus doesn't show up at all. I filled all 5 vending machines and waited, and it said "soon" for hours. When I hit the "reset" button it told me the party was a success and gave me the popularity bonus for having all the vending machines filled. So I didn't lose anything, I guess, but the party never actually happened, even though it was working fine at earlier levels. I've done this 3 times now, same result every time, across multiple (real time) days. I'm sad because I wanna know what the level 4 mystery surprise is!

Also, I think my delivery vehicles are getting stuck behind the stuck party bus, because they don't show up (not even the yellow numbers) until after I hit the reset button as well.

Any advice would be helpful. I've validated the install, the files seem to be fine. I only have one save that's this far into the game so I'm not sure if it would also happen on my other saves.

[Kate Miller]

Had same issue plus Tourist Bus had not appeared in over 30 hours (real time) so around 75 days in game time. This appears to have resolved itself.
Used many resets (red button) and/or shut station to clear Party Soon. The Party Bus arrived but there was no flying saucer, smoke or fireworks. Odd thing was the clock was still counting down (at around 21 minutes) but with 'Party' superimposed. Party ended with no popularity points (buckets were cleared by resetting).
Went back to fill buckets. Party sounds still playing although party area empty. Tried another shut station.
Restarted. Party area now clear. Try to fill first bucket. Cursor gone so can't click tick or cross. Still moving in background and money graphic going up. Able to use Escape then save and exit.
Now what might (or might not) be significant. On restart, I got the party over, no points message. It immediately put the same message up again. Cleared it and the message appeared a third time. This seems to have 'burped' the system.
About 2 minutes later, the long lost Tourist Bus turned up. Filled buckets and monitored for next party. That started okay but wouldn't stop. Again only party goer sounds. Save and exit. On restart party ended but now music playing. Save/exit/restart. Party area clear and quiet.
That next party arrived on time. Initially the sound was that you normally hear when party ends. Party started with no effects. Save and exit. On restart, all party effects and sound working fine. Soon after another visit by Tourist Bus.
Since then, two Party and Tourist bus cycles have passed without incident. Too soon to confirm but delivery vehicles not going missing now.
This might have been blind luck or possibly those three back-to-back party over messages indicated a bottleneck of failed parties clearing out.

EDIT. Me and my big mouth. After those two good cycles, both the Party and Tourist Bus went missing. A reset got the party over message and shortly after that the Tourist Bus turned up.

[Slynner]

Reporting here. I had the same bug and i couldn't continue the game progression, i was playing with directx12 and tried to change to directx11 because of sometimes some APIs make games to failure. So, if you have this bug, try to change the API you play with.