Sims 4 vampires dying

Okay, so the grave just appeared so I'll be able to resurrect her, but my question still remains: How can I stop this from happening again?

To avoid catching fire keep your vampires indoor during the day. One of the Vampire powers you can get allows them to stay outdoors for longer. There are also a drink you can make that has a limited time effect.

I know that, but the problem is that I can't always control them. The scenario I gave is what I'm worried about. If I'm playing a different household, & a vampire comes to my lot while my current Sim is selling something at his/her store then there's the high risk that they will burn. 

This will only happen on areas you can currently see.

So if she is at her store just keep the view on the store and its surroundings.

Two of my Sims died like that, when I was playing with another Sim, and the camera was not focused on them. Fortunately, for one of them I had a previous save point (she is the heir of the family, thank god for that).

But the other one, she died and no urn appeared! 

Yeah, I've had problems with that, too.  The short version is that vampires have no sense of self-preservation and just stand around playing on their phones or whatever in direct sunlight until they die. 

Instead of reset object, what has worked for me in the past is "cheat needs," since they won't die until their vampire energy drops to 0.  Cheat needs, and then immediately travel to rush them inside.  I've also spent death flowers on my unfortunate vampire neighbor who lived in Sulani and decided to go wading in direct sunlight. 

But generally?  They're all suicidal when you're not playing them.  ☹️  Get them sun resistance as soon as you can if you play rotationally. 

Hey, this thread was  reported as a "necro, as it's from 2017, so we'll lock it down. Thanks for answer/tip @xochiquetzl_xkvn