It did not help. I updated to the latest version 2.2.3 and that checkbox was already selected. Hover still did not work. I unchecked it, saved, checked it again. Tested hover and it still did not work. I’m going back to the old version again. Thanks for trying though!
Reverting back to version 2.1.6.1 has fixed the issue for me. Hovering is working as before.
It appears to work in the default theme. However, the only thing I upgraded was this plugin. I haven’t updated anything else. Do you have a previous version I can try to downgrade to?