quick fill text not work!

As I see at your screens — you are using RTL lang.

I installed arabic locale and tried to repeat — nothing repeats..

https://gyazo.com/daade0cfa4aa407be17394b93ed67b76

I think issue related to something else in your concrete wordpress version and other plugins combination.

I can provide you a paid support on your side. If issue is on plugin side — I will refund the money.