She had prescription medication given for a urinary tract infection at the home when she died, according to the report.
Stylez left the porn industry in 2016 after 10 years.
It is not known how she got the substances into the facility where she was being treated for addiction.
It is not clear if any of the five models who have died recently knew one another.
Direct Models said Lua had been battling addiction for some time and was seeking help.
So far, no reason has been given for her death.
If this was mixed with recreational drugs or alcohol, it is believed this to be the cause of her passing,' he said.
On January 9, 20-year-old Olivia Nova died in her bed in Las Vegas.