Please try to check this one, then it will be much faster to find the control. But it will find new control too. So please make sure the seek condition for this control is correct.
I did not fully understand your message.
If you use 20 Keyboard(web) commands to add lines to the input field (and 20 more to add spaces), it will take a long time, because each command should find required web page element.
First you can create full string containing all the words and spaces, then use only one command New Keystrokes Emulation (web) with selected variable to insert full message.
You can create full message in several ways:
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