Download all submissions downloads broken zip file when streaming from S3

[nbozhkov-ucl]

Trying to download all submissions in a Moodle assignment with a large number of submissions results in a broken zip file.

Trying to unzip the file produces the following error:
"Unable to expand STAT0023_22-23.zip into Downloads. Error -1- No such process"

Using CLI to unzip complains randomly with different errors but produces a folder with most files working and few empty/ broken ones. See output from run1 below:

warning [STAT0023_22-23.zip]: 5268 extra bytes at beginning or within zipfile
(attempting to process anyway)
file #1: bad zipfile offset (local header sig): 5268
(attempting to re-compensate)

Please also see https://tracker.moodle.org/browse/MDL-72935