Lagging cursor in Word while using arrow keys

I also have been experiencing odd cursor behavior in Office (Word).  When holding an arrow key, it is slow to respond, and then suddenly jumps several words.

When selecting to the left with the arrow key (SHIFT-Left, hold), it initially selects to the RIGHT and then jumps to the left, selects some text leftward and then jumps right and then jumps back left, jumping and selecting to the right and then left of the initial cursor position as it slowly progresses leftward.  The language setting is English, with left-to-right paragraphs.

The behavior with single arrow presses is as expected.  It is only pressing and holding the arrow key that is causing problems.

Outlook is not affected, and it seems neither are PowerPoint or Excel.  This behavior began very recently, perhaps Monday, 6/14/2021.