Rather a suggestion than a bug report, I guess, or somewhere in between.

 

When pasting multiple items, e.g. from another grid, the text of the focussed item is overwritten (with the first item pasted?), then the other copied items are added as new items. I think it's very unlikely that's what the user wants in this case. It seems more acceptable when pasting a single item though I'm not sure I really like the overwriting in that case either. This also only happens with regular copy, and not, for example, wilh .xml copy.