Retry on Fail not Working TRB245

I’m working on PoC, where we will use Teltonika and AWS IoT Core, one of the important requirement is the capability of the device to Save data locally when internet is down and resend data when internet is restored.
I configure the Modbus, data to server and enable the retry, but when I disconnect the WAN cable or the fiber from the modem and connect them back the “Retry on Fail” is not working, I lost the data.
lostdata

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