Getting "connection lost" error for SFTP source once in a while

Hello Experts,

I am using Rclone in RCD mode to transfer files from SFTP to AWS S3 bucket.
It is working fine but once in while I am getting "connection lost" error (unable to re-produce when needed)

Url : http://rclone:5572/operations/copyfile
Request body : {"srcFs": "melco5_5207_SFTP_a6997e29_1b32_430e_902d_e5053c506a01:/", "dstFs": "melco5_5207_AWSS3_6214a974_c8b2_45c3_a1b9_927e63fc8eb7:", "srcRemote": "/melco/PREPROD/Inbound/VerticalPlan/In_LocationMaster.csv", "dstRemote": "o9dl-awsgt10193/int3/2/melco5/EKG/EKG_IN/IN_In_LocationMaster/IN_AWSS3_In_LocationMaster/In_LocationMaster.csv", "_async": True}

job/status end point response:
{
"duration": 300.183732733,
"endTime": "2025-05-13T05:41:50.521502394Z",
"error": "failed to open source object: Open failed: connection lost",
"finished": true,
"group": "job/129238",
"id": 129238,
"output": {},
"startTime": "2025-05-13T05:36:50.337769653Z",
"success": false
}

Rclone version : 1.68.0
Running in remote api mode (rcd)

The source file (/melco/PREPROD/Inbound/VerticalPlan/In_LocationMaster.csv) size is 4.75KB only.

What could be the reason for this and is Rclone re-trying internally with SFTP?

When I try to check this retry flags settings, logs shows retry attempts clearly in command line mode but was not seeing the retry for remote rcd mode.
(this I had tested for some other case but not this connection lost case)
(Retry logic for cmd based copy vs remote api sync/copy)

Thanks in advance,
Mahendra

hi, can rclone selfupdate and test again...

Thanks for the reply.
Noticed that env where we got error is running with Rclone 1.69.0

This error is quite intermittent, I ll try to run re-produce in my dev machine with latest Rclone and get back