Bluetooth connection stay established after turning off Bluetooth

Hi, I’m developer and connect an application which is running on an 23Ultra with my custom developed device by Bluetooth-LE
The Bluetooth connection is stable. But if I turn off Bluetooth on the S23 (Bluetooth is marked as disabled in device settings) while the application is running, the connection stay established until I close the application.
I tested the application also on a PIXEL which immediately terminates the Bluetooth connection when Bloothooth is switched off.
Why stays the Bluetooth connection established even if I turn of Bluetooth?
OneUI6.1/Android14, Build: UP1A.231005.007.S918BXXS5CXDF


Please create a support request in the Samsung developer support.