Straight sim keeps flirting with his male friends

Heya,

Just opening a topic on an issue I seem to have since sexual orientations were introduced : I have a straight sim who keeps flirting with his male friends for no reason ! He has a wife, but anytime he speaks to his friends (they're gay if that changes anything) he starts flirting with them despite me telling him not to.

At first I thought it was a matter of his sexual orientation being set wrong because I created this sim before that feature was released, and his settings were indeed set on gay, which I changed, but even after specifying him to be attracted to women only without the possibilty of trying new things, he keeps flirting.

It's pretty annoying for a few reasons : if his wife is around, she gets mad and stressed because of his apparent infidelity, and his friends are a couple too, so if he's talking with both of them and one sees the other flirting with him, he also gets mad and stressed.

Is this issue also happening to other people ? Am I doing something wrong or is that a bug ? Thanks !