Hi denkyira,
According to your description, and I create a simple asp.net MVC application with entity framework, visual studio enterprise 2017, it works fine.
Could you please provide a bit more information about the issue, such as related pictures, how can I reproduce the issue on my side.
In addition, about how to map a stored procedure in EF database first, please refer to:
https://stackoverflow.com/questions/43821023/stored-procedure-in-entity-framework-database-first-approach

Best regards,
Zhanglong Wu
MSDN Community Support
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