Can I keep the position when use actor merge on foliage stuff?

Hello, I use foliage tool to create a group, now I want to merge them into 1 static mesh, but the result is every thing will be back to together after merge. Can I keep their position that I did with foliage tool? Thanks

118981-捕获020.png

is this a bug or is it this way by design ? I need the same thing