MacOS Sonoma: live captions grayed
 

Hi there,
MacBook Air M2 2022, macOS Sonoma (14.0), Ugreen Dual Display 9-in-1 Revodok USB C 4K Universal Docking Station, Dell P2421DC.
The MacOS Live captions are getting grayed as the Docking station is connected (just a gray rectangle). Without a Docking station with one monitor Dell P2421DC Live captions work properly.
Has anyone met this issue? What could be a solution?