The blueprint library of my plug-in is not usable in the packaged game

The blueprint library of my plug-in which is a engine plugin is not usable in the packaged game.It works well in the UE4 editor. When I move the plugin to the game project, it also works well. Is this problem a bug?

I have same trouble sometime ago, I did change the plugin to Runtime instead Developer, and now works
Hope helps!

Cheers

To make sure your plugins will target GEngine, set its modules to “Runtime” and use
IMPLEMENT_GAME_MODULE() instead of default macro.

6.In the staging directory for your plugin, delete the Intermediate directory. These are temporary files that should never be distributed.

I deleted the Intermediat directory as the document . When I don’t do that, it works.
So far,I haven’t seen the souce code about this problem.