Thankyou Pascal. The issue isn’t restricted to a second monitor configuration
It occurred again this morning with a Properties Panel floating over the desktop (on the same monitor as Rhino).
The exact triggering actions I can’t determine.
When the bug occurs the behaviour in one instance was consistently thus: in a Text object’s Text Properties window (other object properties windows or incidences of the bug may differ) the text cursor disappeared / became inactive only if the mouse next passed - even for the shortest time - over any of the six formatting icons above the text input field on the text properties window. I did this repeatedly in one instance of the bug and the behaviour was consistent.
I then activated the Text Object’s General Properties window (and other windows on the panel) but couldn’t produce the bug on them. On returning to the Text Properties window I then couldn’t reproduce the problem, nor by various types of selection and reselection of the Text object, nor closing/reopening Properties Panel nor the project.
But there’s definitely an intermittent bug, and I’ve seen it in numerical input fields as well, which is of more concern.
It’s dangerous because it can easily go unnoticed and cause errors when working quickly in the usual manner by simultaneously moving with the mouse to select a next object while 1) inputting a new value for a currently selected object and 2) hitting enter. If those two actions have had no effect and the previous value remains unchanged for the first object, a user’s attention is now on the next object to be edited and important edits will remain undone though the usual action to make them has been taken.
I’m not going to work with the properties panel floating for now.
But just because I’ve noticed it in that configuration the intermittent bug may not only be in that condition. I’m changing the title of this thread to something more specific.