In the Converter:
1.) Tap the bottom right corner to modify your preferred units
2.) Uncheck all of those that have a selection
Note: After you confirm and close the unit preferences popup, you should not see any conversions.
3.) Close the converter and reopen it.
Now you should see all the conversion units for your Category and "All" in the bottom right corner. All conversations at this point should be accurate again and you can reselect your preferred conversion units if you wish.
Obviously, this shouldn't have happened and we are always making changes to ensure it doesn't happen going forward.