I just tried, and you also can't copy and paste Scripture into forums like this one.
Below are the test results of copying and pasting text I've done.
Test #1 A straight copy and paste from e-Sword.
Praise the God and Father of our Lord Jesus Christ for the spiritual blessings that Christ has brought us from heaven
Test #2 Using Copy Verses method
Test didn't work.
Test #3 Using Test #2 in e-Sword
Test successful
Test #4 Using Paste Into method in e-Sword
Test successful
I've also Tested the Paste Into method from Commentaries and Dictionaries to Study, Topic, and Journal Note editors, and all were successful.
All tests were done using e-Sword 11.02.
Blessings,