[NEEDS SAVES] Excessive singing

While I was playing my Vampire Family (VF). I notice that all my shower and tub were constantly breaking even with upgrade that have a less chance of breaking. So I after a constant of repairing my showers and tubs. I started investigating my sims and notice that one of my sims kept repeating "Sing in Shower" even though she was 100% clean. I thought maybe this is just a in game bug, even refreshing didn't help me out as well. Now I'm not saying that it happen to all sims in the same household, but there will be 1 or 2 sims in my household performing/repeating "Sing in Shower." while 100% clean. Of course I could have avoid this problem, by not having them learn how to sing to level 2 in order to perform "Sing in Shower," but the damage is already done and I'm in need of it being fix because I hate wasting my time to repair, replace, lose money, or do command. And just Incase this problem was only affecting my VF. I went and test this bug "Sing in Shower" on regular sims in my testing chamber plot. Once they become skillful enough to perform "Sing in shower." This bug happen again. I even used different type of shower/tub. So I know it not the shower/tub fault. I do not owned all sims 4 packs, but 1/6 or 1/7. My VF has a household of 5 and my testing chamber plot has 8. I'm not sure if number matter, but I did have them perform "Sing in Shower" at least once. I'm not sure if they will even perform "Sing in Shower" alone, if the player doesn't command to do so one time. Also it is AI Control/Command afterward. Can be stop if player control Sim to do other stuff, etc. I'm not sure if Sims will repeat taking a showering with other non-normal shower commands like showering in confidence, etc. I'm also up to date in update. And maybe it just my sims wishing to clean off that 0.001% of dirt in their hair, but it annoy for them to constantly break all my showers and tubs. When I'm trying to focus on 1 or 2 sim at a time.