This is an old known problem, but I can't find an open bug about it. So I'll
open this one for consideration.

Basically frames cannot be grouped together with drawing objects, but drawing
text boxes cannot support the rich feature set of frames, e.g. tables. So on
import from msword either a frame or a drawing object has to be selected when
importing a msword drawing text box. The current selection defaults to frames if
possible, but will fall back to drawing objects if grouped with something else.
This leads to the problem shown in the attachment.

Ideally the import could always use frames.