20.2.3 problems with math typesetting

[Rahav Dor]

I just updated to desktop 20.2.3 and some of the existing mathematical typesetting do not render as math any more.

Copying an equation that render correctly to a new shape doesn't render in the new shape. Turning OFF mathematical typesetting and back ON, does the work.

Typing a new equation behaves the same. It wouldn't render before the OFF and ON.

Editing an equation that renders well will not render after the edit.