iocage snaplist fails with recursive snapshot

I have peridoic snapshots that I run nightly for iocage dataset and I have recursive snapshots enabled. As of 12.0-RC1, I now get the following error when running `iocage snaplist <jail>`:

```

iocage snaplist emby-server
Traceback (most recent call last):
File "/usr/local/bin/iocage", line 10, in <module>
sys.exit(cli())
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 764, in _call_
return self.main(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 717, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 555, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/iocage_cli/snaplist.py", line 43, in cli
snap_list = ioc.IOCage(jail=jail).snap_list(_long, _sort)
File "/usr/local/lib/python3.8/site-packages/iocage_lib/iocage.py", line 1668, in snap_list
creation = snap.properties["creation"]
File "/usr/local/lib/python3.8/site-packages/iocage_lib/resource.py", line 23, in properties
self._properties = iocage_cache.datasets[self.resource_name]
KeyError: 'Sasquatch/iocage/jails/emby-server@backup-before-12-upgd'

```

PS - this worked fine in 12.0-beta1. Thanks, L