Bug of the action of copy with kmail-trinity

Hello, There is a small bug with kmail-trinity, since a long time, versions 3.5 and 14.0. When I highlight a word or sentence and want to make a copy, (left button of the mouse), a menu appears, without the possibility of copy, but instead, suggestion of others words. This bug appears sometimes, not all the time... and when it does, kmail is blocked, I have to wait some seconds to retrieve kmail normally, and often, always without the possibility of copy. When I have to write ca mail in a hurry, it's really an inconvenience. Best regards to us. André