[ARCHIVED] Events cancel immediately when arriving on lot (NPC invitation)

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Often (50% - 99%)
What is your current game version number? 1.90.258.1030
What expansions, game packs, and stuff packs do you have installed? All of them except for kits.
Steps: How can we find the bug ourselves? Uncontrolled Sim invites you out.
What happens when the bug occurs? Events auto-canceling.
What do you expect to see? Events NOT auto-canceling.
Have you installed any customization with the game, e.g. Custom Content or Mods? Never used.
Did this issue appear after a specific patch or change you made to your system? Yes
Please describe the patch or change you made. Updated to the most recent patch and installed High School Years.

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Happened 3 times. My Sim's friend asked my Sim to the Hijinks Festival. Upon loading, the event almost immediately cancelled. A different friend asked to go get drinks at the Island Bluffs where there is NO bar (also, these Sims are teens). So I added one. Upon exiting out, the event cancelled. Same friend asked my Sim out on a date and as soon as I went to talk to him, he disappeared and the date canceled itself. 

We need a lot trait or something to designate for Teen dating such as a coffee shop. If there's no bar, then why are we going there for drinks? Why are events cancelling? I have to cheat relationships and sentiments because of the stupid bug.

Semi-unrelated issue, why is a Sim posting about "regretting prom" when Prom hasn't happened yet? With this auto-cancelling bug, I'm going to be very annoyed if it auto-cancels or Sims bug out altogether.

Edit By Crinrict: Adjusted Title to better reflect the issue