This is the kind of issue I was hoping people would find during testing.
That would be the back/return key. I don’t this this is different than how it was before the update.
This is an issue. I will make a proper fix but in the meantime you can add this keymap to fix this issue…
<?xml version="1.0" encoding="UTF-8"?>
<keymap>
<global>
<keyboard>
<escape>PreviousMenu</escape>
<home>PreviousMenu</home>
</keyboard>
</global>
</keymap>
Kodi does not have a virtual keyboard that works like that. You will only get that to popup for text input and that is the only thing it does. If you want to search in the Plex add-on it does have that feature though. If you press the back/return key to bring up the top menu and press left, then OK, you will get a search window come up.