the answer comparison on AnkiMobile unfortunately does not work as well as on Anki Desktop.
In case of a typing error the “provided” and “correct” sections do not line up correctly.
The reason for this is that an additional “-” is added for each error and not only for missed characters.
Therefore the number of characters no longer matches.
Also the css classes “typeBad” and “typeMissed” seems to be swapped. The background colour of errors is grey not red and the background colour of missing characters is red not grey.
Here’s the piece of javascript that fixes the issue. Just add it to the bottom of your back template. This should replicate the bahavior of desktop anki