Troubles of Brookfield DTLA show how some office-sector bets are starting to unravel ... A major Los Angeles office owner operated by Brookfield Asset Management is struggling to make mortgage payments as vacancies and rising interest rates disrupt the city’s commercial real-estate market. The company, known as Brookfield DTLA Fund Office Trust Investor Inc., owns six Los Angeles office buildings and a retail center. Five of the office buildings face the risk of foreclosure, according to its public filings, and at least two of its mortgages are in default. The company on April 21 filed to delist from the New...