Flutter - Textfield/keyboard issue whenever clicking on special characters button - flutter

Whenever I type into a text field and click on the special characters button & then try to edit past text by clicking in between some of the letters, it'll automatically highlight all of the text instead of showing the original single cursor sitting between 2 letters. This can be a bit annoying and confusing for the user experience. Is there any quick fix for this?
Note: I'm using a real device (Samsung Galaxy S8)
Here are 2 images to better explain this problem:
Trying to edit text before clicking on special characters button:
Trying to edit text after clicking on special characters button:

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