az vmss run-command invoke fails with multiple VM ids

> ### `az feedback` auto-generates most of the information requested below, as of CLI version 2.0.62

**Describe the bug**
I am using the az cli within PowerShell. I have tried the following, which only runs the command on the first VM instead of all the VMs listed:

`az vmss run-command invoke --command-id RunPowerShellScript --scripts `@script.ps1 --ids ((az vmss list-instances -n REDACTED -g REDACTED --query "[].id" --output tsv) -join ' ')`

I confirmed that the `az vmss list-instances` command returned ids for all the VMs in the VMSS.

**To Reproduce**
See above. (I am also internal and happy to debug this in real time :))

**Expected behavior**
I would expect the command to be run on all VMs in the VMSS.

**Environment summary**
az version 2.29.0
PowerShell version 5.1.19041.1237

**Additional context**
n/a