How do I clear the blue highlight from a fill in form?

Hi there

Hope you are doing well and thanks for reaching out.

I have tried to reproduce the issue at my end and the application is working as expected. 

As you have the application updated to the latest version, you may also try to reset the Acrobat preferences as described here https://adobe.ly/4k1Qh9F and see if that works.

If it still doesn't work, please share a small video recording of the steps you are taking and the issue as it occurs along with the version of the OS you are using on your device for more clarity.