Xshell the problem of automatically wrapping text after a paragraph is selected with the mouse

Phenomenon:
Using Xshell to connect to a remote server, it is generally checked with the mouse selected, then Ctrl+insert copied, Shift+insert pasted.
But when the selected release mouse, is in the Xshell lost a return to the appearance of automatic line, is actually a CTRL + C key combination. If the current terminal is being debugged or something, it will be interrupted.
Reason:
1. It is the use of NetEase's "Youdao dictionary" of the words to take the word function caused. Personal guess: As long as you draw a word, Youdao dictionary will add a ^c terminator.
2. May also be the use of PowerWord translation function caused.
Solve:
It's OK to turn off the word function.

Off-topic: In Xshell can be directly set, select that is copy, right-click Paste, use more convenient, as in the putty.

Xshell the problem of automatically wrapping text after a paragraph is selected with the mouse