Hello @REZAI Arash ,
welcome to this moderated Azure community forum.
Thanks for sharing your observation.
It feels to me this is an omission of the Azure portal although the ARM solution is able to work around this issue.
You can always give feedback in the Azure portal regarding issues:
I notified someone from the product team and asked him for a reaction.
Thanks again for sharing this.
If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. All community members with similar issues will benefit by doing so. Your contribution is highly appreciated.