I believe I found a bug.
I have this super simple workflow to demonstrate it:
There is one in Argument in Main.xaml in_Name that has Default value “Robert” as you see.
If I run this from Orchestrator like this (nothing set in Arguments):
– it correctly displays popup with the default value.
but if I run it in a same setup from the Assistant (nothing typed in the arguments):
– then the result is:
The default value is overwritten by empty string “”
So, is this a bug or a feature? 
Should it work like that?
(And whilst you lovely guys from UiPath are here, can you please answer my other question? User cases for Non-production robot / testing robot - #2 by Roman_hruska )
Thanks