esphome-jk-bms: JK-B2A8S20P doesn't accept new settings (hw 11.XW, sw 11.26)

Hi using jk-bms B2A8S20P

hardwware v11.XW Software V11.26

Tried to change overvoltage recovery via MQTT

jk-bms/number/jk-bms_cell_voltage_overvoltage_recovery/command -m 3.9

looks like new number was recognized but not stored? see log

when sending command, there is also a beep from BMS

[14:45:41][V][esp32_ble:206]: (BLE) gattc_event [esp_gatt_if: 3] - 10
[14:45:41][V][esp32_ble_client:111]: [0] [C8:47:8C:EC:77:7D] gattc_event_handler: event=10 gattc_if=3
[14:45:41][VV][jk_bms_ble:220]: Notification received: 00.00.00.00.00.00.00.00.00.FE.FF.7F.DC.0F.01.00.00.00.00.00.00.C6 (22)
**[14:45:41][D][number:054]: 'jk-bms cell voltage overvoltage recovery' - Setting number value**
**[14:45:41][D][number:113]:   New number value: 3.900000**
[14:45:41][D][jk_bms_ble:1225]: Write register: AA.55.90.EB.05.04.3C.0F.00.00.00.00.00.00.00.00.00.00.00.CE (20)
[14:45:41][D][number:012]: 'jk-bms cell voltage overvoltage recovery': Sending state 4.180000
[14:45:41][V][esp32_ble:206]: (BLE) gattc_event [esp_gatt_if: 3] - 4
[14:45:41][V][esp32_ble_client:111]: [0] [C8:47:8C:EC:77:7D] gattc_event_handler: event=4 gattc_if=3
[14:45:41][V][esp32_ble:206]: (BLE) gattc_event [esp_gatt_if: 3] - 10