Apple Pencil Skips on Part of Screen

I have exactly the same problem as this user:

Apple Pencil skips on one part of the scr… - Apple Community

Except that I have a 3rd generation iPad Pro 12.9” running iOS 16.3.

I’ve been in two, hour-long talks with Apple Senior Technical Support people and have shared my iPad’s screen to demo the problem. They’ve had me reset, and twice completely erase the iPad (once by itself and again using an iMac as this apparently downloaded a fresh copy of iOS 16.3). All to no avail.

These are the particulars of this behavior:

The vertical blank column of the screen is in the middle of the right half of the screen, and about 3/4” wide. The top 2” of the screen in that area behave normally, while the stripe below that becomes increasingly more likely to make the pen skip as you move down. However if you move the pen slowly from outside this strip into it, you can keep the pen from skipping. Using one’s finger generates no skips at all. On three occasions, I temporarily ‘fixed’ the skipping. Twice by changing between my wife’s and my own 2nd generation Pencils, and once by flipping the iPad into portrait orientation. However 98% of the time, the behavior is consistently repeatable in that portion of the screen. It occurs across all apps, but only with the pencil (both examples of the 2nd gen. Pencil I have).

This problem is currently unresolved, but renders my costly Shapr3d subscription (CAD) almost useless on this device as it’s very pencil-dependent. Enclosing a YouTube link to a video showing this problem on my iPad Pro.