We’re learning more about the sudden death of comedian Ken Flores, who died at age 28 in his L.A. home Wednesday … he had been dealing with heart issues, and tragically, he had been actively trying to get healthy before he died.

Law enforcement and sources close to Flores tell TMZ … Ken had been suffering from congestive heart failure for a long time, and had been in and out of hospitals over the last two years.

Ken had been losing weight and trying to get healthy … but we’re told he had been using oxygen — and oxygen tanks were found in his residence yesterday.

As we told you … one of Ken’s friends found him in his home after he experienced cardiac arrest and called 911, performing CPR on him until paramedics arrived. He was pronounced dead at the scene.

No drugs were found and no foul play is suspected, sources tell us.

Ken’s family shared the news of his death online, asking for privacy. Ken had just started a comedy tour earlier this month.

The Los Angeles County Medical Examiner’s Office has completed the autopsy and will now wait for the toxicology test to come back in order to release the cause and manner of Flores’ death.

Stassie Karanikolaou is making the most of her getaway to the Turks and Caicos Islands … putting her fit frame on display in a number of skin-showing looks, perfect for the tropical weather.

Check it out … Kylie Jenner‘s best friend dons a number of sultry swimsuits, including one black 2-piece which left little to the imagination. The bikini in question is a classic microkini and allows the itty-bitty straps of her bottoms to sit high on her hip bone … in turn, making the Turks and Caicos heat even hotter!!!

Stassie brings a similar provocative aesthetic off the beach … just take a look at the revealing white halter top she’s rocking in this pic from her vacation. The back is nearly fully exposed, showing off Stassie’s sun-kissed skin in the process.

Then there’s her pretty in pink athleisure wear, the perfect, lightweight look for sightseeing around the British Overseas Territory.

Of course, Stassie isn’t the first celebrity to make Turks and Caicos her playground … as everyone from Lizzo to Kristin Cavallari has stopped by the tropical locale.

Famed drummer Travis Barker will take the stage to surprise concertgoers at tonight’s FireAid concert to help raise money for victims of the L.A. wildfires … TMZ has learned.

Sources connected to Blink 182 tell TMZ … in a surprise appearance, Travis will play drums during Jelly Roll‘s set at the Intuit Dome in Inglewood, California.

We’re told … Blink was one of the first bands to volunteer to participate in the benefit concert, but the group had to pull out because of an issue with one of its members.

For tonight’s show, some of the most famous names in music will perform at 2 venues –the Intuit Dome and the Kia Forum, also in Inglewood.

Among the stars hitting both stages … Lady Gaga, Billie Eilish, Gwen Stefani, Joni Mitchell, Katy Perry, Lil Baby, Pink, Rod Stewart, Sting and the Red Hot Chili Peppers.