Hi @麻衣 小野下 ,
I could not re-produce your issue in my environment. I'm using VS2017 and VS2019.
May I know what's the version of your VS?
Make sure that you have open the active package in the design window.
And please double check that the project property--Debugging---StartObjectID is set to Active Package.
If the issue still occur, please report the issue here. The product team will help check.
Regards,
Zoe
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