why can't I copy contacts' email address from their name card in lync 2010

so here is the issue I have, when I need to copy someone's email addresses or their phone numbers, normally I will find them on lync, move the cursor on them, and their name card will show up, then I move cursor to their email address or their phone numbers, right click it, there will be an option to "copy", right? but sometimes, right clicking doesn't work. that copy option just won't pop up, this issue happens randomly, I need to restart lync, then it will work again. Also, there is one thing that's weird, after I restart lync, whatever I have copied in the clipboard will disappear, like if I press ctrl+c to copy something from word, then this issue happened, I restart lync, I can copy information in lync name card again, but all that content I copied does not exist in clipboard anymore, I press ctrl+v, there is nothing coming out.
 this is not a big problem, but it's really annoying, does anyone know why this issue happen and how to permanently? I tried to reinstall, does not work.

this issues happens with both lync 2010 32 bit on 32 bit win7 and lync 2010 64 bit on win7 64 bit.