Symptoms
Asynchronous rule execution on a picker control does not display the correct SMO data.
Diagnoses
This behaviour is unexpected and a TFS item has been logged for this issue to be resolved in a future release.
Resolution
Workaround:
Using 'and' or 'then' rule execution instead.
In terms of performance, changing asynchronous to 'and' (in a batch) or 'then' (one after another) would not have a performance impact. 'And' will give you the lowest performance hit due to single server execution and it's recommended, unless there is a 'one after another' logic required.