If you have any familiarity with CBRE, then you know that a shared office environment is totally against everything CBRE does
CBRE Launches New Coworking Brand, Hana: https://allwork.space/2018/11/cbre-launches-new-coworking-br...
CBRE Launches New Coworking Brand, Hana: https://allwork.space/2018/11/cbre-launches-new-coworking-br...
(note: I've never used Hana though I walked through the one in Palo Alto just out of curiosity, and it simply looked like a random co working space).
There’s always competition between divisions at large companies.
Also these guys might not have gotten the memo yet, or they did get the memo and there was friction about someone using CBRE property to “compete” with a business unit that wasn’t public knowledge yet.