Not working with WP update

i can confirm that the plugin doesn′t work anymore on WordPress 5.9

It still works for me in 5.9 (have used it for some time now). The problem is that making any adjustment to a post will cause the checkmark to disappear and the title appears. (This behavior was seen before 5.9.)

This has been a most welcome addition to my toolkit, just wish it didn’t require constant checking to see if it is active or not.