Screenshot comparison
page1
Modify → Convert -Y To metafile will change layer
of this shape from „Comments“ to „Layer“
Modify → Convert → To Metafile
changes layer to „Layout“
Short Description
Step By step
See title, same problem with 'Modify → Convert → To bitmap'
Test Area
Click blue Rectangle
Menu 'Modify → Convert → To Metafile'
Expected: no bigger changes
Actual: became invisible, because Layer has changed to Layout, what is protected and invisible
> For a test you can check visibility in Layout Layer Tab, rectagle will become visible