I am also experiencing this touch screen problem from the very beginning when I got my 16 pro max in September. At the moment the phone is on ios 18.1 and the issue has been narrowed by a bit, but it is still there and is so fr annoying.
The issue I am seeing with the touch screen can be reproduced by touching and holding the very edge of the display, with right hand thumb for example, and with the left hand finger try to slide on the display, and it has frozen. In my opinion most of these issues are caused by the "edge detection algorithm", once you touch the edge of the display, it becomes unresponsive, and making us think that the keyboard doesn't work how it should (not impressed at all how it works anyway). I have tried to reproduce this in the video link "iphone 16 pro max touch screen freezing"
Also regarding the text navigation and correction, I totaly dislike how you navigate through the written text, it is so difficult to point (by touching with your finger) to where you want the cursor to be, e.g. in front, back or between letters of a word , it is giving me headaches. But this is another issue, and I hope they address them both in the end. 2024