Active Sim freezes on lot load, A-pose after Reset (No Mods)

I’ve been playing the same save for about 3 years with the same household. The issue only started sometime in the past year after game updates.

I completely removed all mods and tested in a vanilla game. The issue still occurs.

Symptoms:

• Time continues normally.
• My active Sim stops responding to commands.
• Reset Object causes the Sim to stay in an A-pose for about 30–60 seconds.
• Other Sims don’t A-pose, but they stop performing interactions until my Sim recovers.
• Going to Manage Worlds and loading the lot again immediately fixes the issue.
• It happens more often after traveling between lots multiple times.
• No LastException or Better Exceptions reports are generated when this happens.

The issue happens mostly during zone loading, especially:

• when loading into my home after starting the game
• when traveling to High School.

Once the simulation finishes, everything returns to normal.