Ble Sends some Junk Data

[MCV.1]

Hi all

i am using blenrg2 m2sp chip as network mode. its operating as peripheral device and communicating with host controller through UART with 115200 baud rate .

I received BLE read characteristic request , i did not response till 1 second after that i getting some junk data , after that ble got disconnected . may know the reason . here attached logic analyzer