Summary
Following the release of 1.18.30 today (20-April-2022), I found that some of my settings had been changed. When I went into Settings > Touch > Invert Y-axis, I found that it is no longer functional.

Fixes Tried

1. Resetting all settings to their default positions, then manually changing them back
2. Quitting and re-entering the world
3. Closing and reopening the app
4. Signing out and back in
5. Freeing up memory on my phone
6. Deleting the world and beginning again
7. Uninstalling and reinstalling the app.