[Copy & Paste] need to paste two times to get correct contents

[elexis]

Most of the time I need to press ctrl+v two times to get the correct clipboard contents.

I open 0ad, get into the game lobby, enter some text, copy or cut it (ctrl+c or ctrl+x) and paste it (ctrl+v).

Result: It pasted no text. If I press ctrl+v again it pastes the correct text.

If I copy from another application, the pasted string is sometimes correct when pasting the first time.