Hi,
The response I received from expert team....
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Hi Ladislav,
I have tried to check the issue and also tried to reproduce on my side but it seems it's impossible.
As far as I know, the creating or modifying LDF files feature are supposed on this release version(LIN_stack_S12_4_6_6_210629). That means we can change, update or edit the LDF files on the GUI interface as below:

Anyway in my opinion, the cause of the problem may come from the customer's LDF. So, I would like to share with you a LDF file(Attached) that you can rely on to check.
And please share with me the customer's LDF file if the issue is still not resolved.
Thanks,
Diep
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Best regards,
Ladislav