This is a very weird bug, and I’ve only encountered it once before on my iPad, but it just happened on my iPhone too.
Basically, when tapping a text field, the keyboard will no longer show up. You’ll notice at the bottom there’s a small toolbar that appears (which seems to be the top of the keyboard), but nothing more.
In the screen recording you’ll first see the issue being reproduced in Voyager (standalone), then with Voyager in Safari (where it works correctly).
I’ve tried reinstalling Voyager, but no joy. Strange thing is that the issue only presents itself in the (standalone) app, not while using it in Safari (as you can see from the screen recording).
FYI: I’m running iOS 16.6 (but it also happened before on iPadOS 16.5).
I’ve had it happen once, quitting the app and reopening it fixed it for me (not voyager, some other app).