I am using ble_app_hids_keyboard example from SDK : nRF5_SDK_12.2.0_f012efa with nRF52 Dev kit. In that example, keys_send() Function is calling under BSP_EVENT_KEY_0. which is default button press event. i changed position of keys_send() function from there to another and i am getting execution freeze in SD_BLE_GATTS_HVX (). it didn't return from there. can anyone help? Thank you.