Sims invading home (Private Dwelling Lot)

This is so annoying. I too have a (supposedly) Private Dwelling and my doors are locked for everyone but the household, yet almost every (in-game) day some bozo waltzes in, laughing and clapping like a seal. Heck, I've even seen people climb in through the window. But because there technically can't be anyone unwanted on my property, Send Away isn't available in their menu. Sometimes they take the trash out, so at least there's that. But I'd still prefer if Private Dwelling and locked doors actually meant something.

Some of my observations about this matter:

• Invaders are either fans or teens asking someone to prom.
• With fans it has been happening ever since Get Famous. It happens when you're famous and stops if you quit fame. Therefore I don't think other packs are related to the problem.
• They really don't seem to be using front doors, something I realized after reading this thread.
• On my current game, it has happened in different worlds. First in Willow Creek, then in Newcrest. So, it's probably not limited to any certain worlds. Sliding back doors in both houses.
• I've seen people climb in through an escape window from HSY. This happened a lot in my earlier game several months ago, but I can't remember which world I was in. It MAY have been Copperdale, but there's no way I can say it with 100% certainty.
• In my current house I have those escape windows and a fan probably climbed in through one of them. My back door is a sliding door, but it leads to a closed patio. Those windows are in second floor (there's a way to them, of course) and as my family was upstairs celebrating a milestone, all of a sudden there was an extra person cheering. No idea if he was cheering for the milestone or his idol. I just moved in this house, so this is something I have to keep an eye on.
• In a student housing in Britechester, people quite often walked in through the back door (it was a sliding door, in case it really matters), walked through the house and out the front door and then knocked on it. I don't count them as invaders in same sense as fans and teens, but annoying all the same.

One thing I haven't seen mentioned that might affect this issue is the NPC Relationship Autonomy setting from Pack Settings/High School Years. I disabled this setting when I got tired of NPCs proposing to my Serial Romancer. 

I didn't mention Relationship Autonomy because it's irrelevant; autonomy or not, those teens shouldn't bust into a Private Dwelling, especially past locked doors.

Doing this on mobile,  apologies for typos

Which packs do you own (if you have a lot, please list the ones you don't own) all

Please describe in details when you had them enter your home. Sims living on residential lot in sulani with private dwelling lot trait. Townies keep coming over and there is no option to send them home

Have you ever used mods/cc on this save ? Yes, but have been disabled since recent update

Do you have your front door locked ? There is no front door or rooms. It's an outdoor living style on the island.

Do you have the issue in Rental Units/Houses or Apartments ? Not sure, I haven't tried

Do you have the option to send them home ? No

Did you have a party going on and guests just overstayed their welcome ? No

Any specific world you have issues with ? Sulani. I haven't tested in others

Any special type of NPC you have come over all the time ? No

Did you ever give the Sims coming in a key ? No

What are they doing once they are in your home ? Talking to my sims and using the sink

Anything else that comes to mind? nothing

The Ring Bear keeps letting himself into my house in Vista Hermosa, even though I have the Private Dwelling Lot Trait. It takes multiple "Send Home" just to get him out of the house. I've had to start locking my door to keep him out, but he still lingers around the edges of the property. He naps on my bench, sits at my chess table, and he's currently stinking, filthy and passed out in front of my house. Something needs to be done about him.