Resource file gives me BlobDownloadMiscError - FileIOException

Question

I'm getting the following error in Batch when I submit a job. The job contains a task that runs a docker compose file. I specify several resource files as links to files in Blob storage. When I submit the job to a fresh pool, it works fine. However, sending another job (with a different name, but the same content) to the same pool, gives me this error:

FileIOException('Failed to allocate 114 bytes for file /mnt/batch/tasks/workitems/<file omitted>')

At first, I thought this might be the node running out of space. However, when I SSH into the node, and check free space, I see:

admin@<node-ip>:/mnt$ df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       124G   25G   99G  21% /
devtmpfs         56G     0   56G   0% /dev
tmpfs            56G     0   56G   0% /dev/shm
tmpfs            12G  1.1M   12G   1% /run
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs            56G     0   56G   0% /sys/fs/cgroup
/dev/loop0       64M   64M     0 100% /snap/core20/2015
/dev/loop1       41M   41M     0 100% /snap/snapd/20290
/dev/loop2       92M   92M     0 100% /snap/lxd/24061
/dev/loop3       64M   64M     0 100% /snap/core20/2264
/dev/sdb15      105M  6.1M   99M   6% /boot/efi
/dev/loop4       41M   41M     0 100% /snap/snapd/20671
/dev/sda1       251G   84G  155G  35% /images/disk1
/dev/sdc1       724G   29M  687G   1% /mnt
tmpfs            12G     0   12G   0% /run/user/1004

/mnt has plenty of free space available. I also tested creating a large file in the same location in my SSH session, which worked fine. Why can't Batch allocate space for my resource file?