[OPEN] [HSY] Already married Sims ask another Sim to marry them [ Edited ]

[PositivelySIMful]

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? 1.90.358.1030
What expansions, game packs, and stuff packs do you have installed? All of them
Steps: How can we find the bug ourselves? Play two Sims not living together in a romantic relationship
What happens when the bug occurs? My SIm was having an affair with a married NPC. The married NPC came over and a pop-up said he was proposing. He was still married, had not left his spouse.

What do you expect to see? I expect for Sims to only propose when they're single.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Yes
Please describe the patch or change you made. Uploaded the new expansion pack this morning.

Edit By Crinrict: Adjusted Title to better reflect the issue

[gertie47]

@PositivelySIMful My sim also is having an affair with a married sim, he proposed, and she accepted, and it gave the option to elope immediately. I did so to test it out, and now the married sim is also married to my sim.