Multiple jobs with template stanza to the same destination docker mount file fail

Board,

I am working to have multiple docker jobs run with a template stanza to define a config in the docker. When I run one docker it works perfectly. When I run another job with a template entry in the job to the same destination docker /local/filename I have a constant reboot of the docker job.

If I change the destination /local/filename to be different on the second job my job runs successfully.

### Nomad version
Nomad v1.0.4 (9294f35f9aa8dbb4acb6e85fa88e3e2534a3e41a)

### Operating system and Environment details
Ubuntu 20.04 LTS
### Issue
two jobs with template stanza statements to the same /loca/filename cause a failure on the second
### Reproduction steps
run two jobs with a common destination /local/filename, the second will fail.
#### Expected Result
Two Jobs running successfully.
#### Actual Result
The second job loops and fails.
### Job file (if appropriate)

```hcl
template {
data = <

The issue names no source files or tests. Start by reproducing two Docker jobs with template stanzas writing to the same destination, then inspect the client and allocation behavior around the failing second job. Done means both jobs run successfully while sharing the destination path, with the failure explained or covered by a regression test.

Written by the indexing model from the issue text.