Submit_sm resp after deliver_sm

Hi All,

Greetings, I constantly observing these message in the log file and get informed that dlr is missing :

Sample log :

2021-08-05 11:21:24 [6842] [8] ERROR: SMPP[6Series]: got DLR but could not find message or was not interested in it id<1C1B9970> dst<601139873013>, type<2>

From pcap trace I found that the deliver_sm received before submit_sm.

[cid:[email protected]]

Does Kannel write the dlr-url to the db after receiving the submit_sm : resp?
Is there any way to handle this issue as the vendor mentioned that it was normal, kindly advise.

Best Regards
Arif Noor