"Loosing" multiple selection (vertexes/edges or faces) in UV Mode when moving them


since I’m very new to blender I got a strange problem working with the UV Editor:

If I select multiple vertexes or edges in UV Edior by holding SHIFT and want to move them, I’m always lossing the multiple selection and I only can move 1 vertex or edge.

In 3D Editor selecting multiple vertexes/edges/faces and moving working fine, but not in UV Editor.

What am I doing wrong?


As in the 3d view, G to move

Thx for it!