Telemetry/conection lost alert missing

Hi, I have a Jumper t8 SG V2/V3 transmitter, with pre-installed factory firmware. I successfully set the voice messages for telemetry Rssi signal level, and the battery voltage level. I use Flysky fsi6ab receiver. But I don't get any message or alert(bip/vibro) if telemetry/connection is lost. After the connection breaks (disconnects the receiver power) I still keep receiving signal and voltage level messages for 10-20 seconds but nothing for the connection lost...
Do you have any idea how to resolve the problem?

Deviation does not keep a general telemetry/connection status.

When telemetry values are displayed the colors are inverted if the telemetry value has not been updated in the previous 5 seconds. Putting a telemetry value on the main page would give a visual indication if it's been updated recently. Not as nice as an alarm though.

Thank you for your reply and your work ,,,,
Sadly I had the bad idea to upgrade my Jumper t8 sg v2 carbon edition with a newer firmware to resolve....
The result was disappointing, at first there was no display. After several upgrades I was partially successful.
Finally I was thinking about downgrading to the original firmware, but the dfu file saved from radio as backup is not compatible with the radio because of the display. My radio doesn't have oled display. Now I don't have altitude telemetry and I can't find the original firmware named t8sg_v2-v5.0.0-0c4b4c0, to have alti telemetry and voice at same time. Have you got any idea where I could find this build?
Have a nice day

The newest builds are available here .

Please try the latest t8sg_v2 version at https://hexfet.github.io/deviation/type0/deviation-t8sg_v2-v5.0.0-330193b.zip . If that doesn't work I can build the old 0c4b4c0 version.

Thank you wery much wll try now..

Thank you Hexfet for your support.
The build was not working with my radio, but at the same time, a friend made an old build for me from the commit 0c4b4c0 which was not working either. Finally the solution was to upgrade the dfu file from 0c4b4c0 and upload the backup content on the radio's usb drive memory. The strange thing is that content backupped by me to my laptop before the upgrading for the first time, is a build named deviation-t8sg_v2_plus-v5.0.0-e801244
Which is not compatible with this radio because of the radio's LCD display.
Finally I succeeded. I have my radio back in its original state, so I'm happy with this.....
Thanks a lot.
Have a nice day,

Good to hear you got it working. The filesystem contents are compatible between all 5.0 versions. Sounds like maybe something was corrupted in the filesystem which is possible but rare.