Yes, it's still an issue. It has always been an issue for me since I've had vampires and seasons together, but I have never reported on it thinking that many people must be having this issue and should get fixed at some point. Vampires SHOULD burn in the sun, so I just took it as the added difficulty of being a vampire, even though holding an umbrella is supposed to prevent this.
What prompted me to finally look this one up, was I just now had a vampire in university step outside and open his umbrella manually so that when he goes to class he won't die, but even though I queued it up like others have said to avoid the debuff "sticking" he was still burning! I can usually avoid this by manually opening my sims umbrella for them, but this is the very first time it did not work. I don't know if something in university made it different or what.
