Sim out from class before it has done

[Similians]

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.63.134.1020
What expansions, game packs, and stuff packs do you have installed? All
Steps: How can we find the bug ourselves? 2 sims travel to Britechester, 1 sim go to class/attend class in university, other sim travel somewhere else.
What happens when the bug occurs? When sim that is attending class already got in class, and the other sim travel somewhere else. Sim that is attending class automatically finish class before it has done. (out from class after loading screen)
What do you expect to see? sim that is attending class finish the class first and not automatically end the class and got a bad grade result.
Have you installed any customization with the game, e.g. Custom Content or Mods? Yes
Did this issue appear after a specific patch or change you made to your system? No

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https://drive.google.com/file/d/1kcCPqaJiU2ZDV_KBHcliBcH-4s0vEMIk/view?usp=sharing

[SimGuruNick]

If anyone is still encountering this issue, could you possibly share a save file with me? You can DM me the link to your save, thanks so much!

Instructions for sharing your save: http://answers.ea.com/t5/The-Sims-4-Bug-Reports/INFORMATION-How-to-Send-User-Files-to-The-Sims-4-Tea...