[OPEN] Loyal trait is making sims cheat

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? The latest
What expansions, game packs, and stuff packs do you have installed? Everything beside some kits and Journey to Batuu
Steps: How can we find the bug ourselves? Play the game in live mode
What happens when the bug occurs? Loyal sims flirt with whoever they met when they are flirty, other sims' flirting to them always work
What do you expect to see? Loyal sims being Loyal to their lovers
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? Neutral/Not Sure 

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Loyal sims are supposed to be only loyal to their lovers, isn't it? mods/cc or not, as long as they are flirty, they will flirty with anyone.