Template Editor window closes after a few seconds

Issue:

In the Print Module/Page/Photo Info, if I choose to edit an existing template, the Text Template Editor window appears and then disappears (closes itself) within a few seconds.  The time before it closes varies but never more than 10 seconds.  Trying to "do something" within the window to keep it open does not help.  However, if you click on edit, but don't move the mouse after, the Editor window stays open.  But once you move the mouse, it closes within 10 seconds.

Filename Template Editor also has this bug but, subjectively, feels like it takes twice as long (~ 20 seconds max) to close.

Lightroom Classic Version Number: 13.5.1

Mac OS Version Number: 15.0

Computer: iMac Retina 5K 2019, Intel Core i9, Radeon Pro Vega 48