Ctrl+Key not working on remote machine Teamviewer 13

I have encountered this going between a machine running Ubuntu 14.x and Win 10 machine, Ubuntu to Ubuntu, Win to Ubuntu, Win to Win.

when trying to use the keyboard shortcuts Ctrl+c, Ctrl+v it appears as though the ctrl key is being ingnored on the remote end. for instance, Ctrl+v results in a v being displayed on the remote device instead of the coppied text. same is true for Ctrl+c. if a block of text is being highlighted to be coppied, only the c is displayed and the text to be coppied is overwritten (while in a text editor)

Searched online nothing fixes this. this is new to version 13 of teamviewer because it did not happen until I changed to version 13.