Sorry for the delayed response.
Could you please try with another pdf file to check if it is not a file specific issue.
Same issue here.
It will crash if I edit the previous added text.
I'm using Asus zenfone 2 android 6.0.1 adobe acrobat reader version 17.0.
Would it be possible if you can share the pdf file with us, I have sent you a private message for the same, please check the inbox.
I have the exact same problem. There is a text box, I go to edit it. I click save and Adobe crashes. This is the latest version of Adobe Reader on a Pixel C 7.1.1