What is the problem you are having with rclone?

Then using rclone mount I have been seeing errors like this: Dir.Stat error: SerializationError: failed to decode REST XML response
status code: 200, request id: 163C63E6DEB02A2C
caused by: stream error: stream ID 19137; PROTOCOL_ERROR

this goes away only with a restart of the rclone mount,
after a small talk with darthShadow, it was suspected that it was http2 that is causing the issue,
after running some test where http2 was disabled in rclone the issue has not appeared.

a flag to disable http2 for s3 would be nice

What is your rclone version (output from rclone version)

rclone v1.53.1

Which OS you are using and how many bits (eg Windows 7, 64 bit)

Ubuntu

Which cloud storage system are you using? (eg Google Drive)

S3

The command you were trying to run (eg rclone copy /tmp remote:tmp)

stress an S3 mount and you will see it

A log from the command with the -vv flag (eg output from rclone -vv copy /tmp remote:tmp)