Force Surface disabled in blueprint

I created a blueprint that contains one static mesh that is set to movable because it will be used as a shadow mesh meaning that I can load any mesh into the blueprint, I want the shadow mesh to bake the light as if static, I know that 4.19 version change this option to Force Surface into Lightmap Type, Force Surface is shown in the menu but I can’t select it, seems to me that it is disable for some reason, I can set Force Surface option into a movable mesh outside the blueprint and it works perfectly. Any thoughts on how can I set Force Surface in my blueprint?..

Also I do have all my lights set to Stationary.

Hello,

Could you provide me the project you are experiencing this issue in? If the project is too large to attach to a response you can use dropbox or google drive shareable links to get the project to me.

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will follow up.