Transaction Insert gives out error sometimes

Similar to TXNCXX-68, We are getting the below error trying to insert a document.

 

The error is sometimes exactly similar to error in TXNCXX-68, but sometimes giving the below error about LCB_ERR_DOCUMENT_NOT_FOUND:

 

[2020-10-08 23:21:30.048] [trace] twoInsertsCommitted: calling op
[2020-10-08 23:21:30.048] [info] first mutated doc in transaction is "e7059535-6196-411c-b70d-7626aa2b4e6e" on vbucket 1005, so using atr "_txn:atr-1005-#18a"
[2020-10-08 23:21:30.071] [trace] get_callback returning result

{rc:1040,strerror:*LCB_ERR_KVENGINE_UNKNOWN_ERROR* (1040),cas:22,datatype:,flags:0}

[2020-10-08 23:21:30.072] [trace] store_callback returning result{rc:1031,strerror:LCB_ERR_KVENGINE_INVALID_PACKET (1031),cas:0,datatype:?,flags:28672}
[2020-10-08 23:21:30.072] [info] updating atr _txn:atr-1005-#18a
[2020-10-08 23:21:30.201] [trace] subdoc_callback returning result

{rc:301,strerror:*LCB_ERR_DOCUMENT_NOT_FOUND* (301),cas:0,datatype:?,flags:0}

[2020-10-08 23:21:30.201] [trace] caught LCB_ERR_DOCUMENT_NOT_FOUND (301), ec=2
[2020-10-08 23:21:30.201] [error] got runtime error LCB_ERR_DOCUMENT_NOT_FOUND (301)
[2020-10-08 23:21:30.201] [info] rolling back
[2020-10-08 23:21:30.201] [trace] rollback called on txn with no mutations
[2020-10-08 23:21:30.201] [trace] attempt not started, not adding to cleanup