sudden backwards typing and no response from most menu items and shortcuts
This a recurring problem that is happening more frequently recently. I am working on a Retina 5K, 27", 2017 with macOS Mojave 10.14.5. My Numbers program is version 6.2 (6520). I can't upgrade to Catalina yet because I use a number of other programs that are not 64 bit compatible.
Here's the problem. I open up a Numbers file that I've been modifying constantly and start working. Everything is fine for a while and then suddenly, any text typed into a text field or a table cell starts displaying backwards. In other words, I type "type," and it comes out "epyt." At the same moment, menu items and shortcuts stop responding. I can't save the file, edit, cut, past, etc. But I can still move tables, and objects around with the cursor. The only solution is to Force-Quit. When I next open the same file, everything works for a while, then the same problem re-appears. What is going on?
Lee