Cursor cannot be placed between letters f and i - "fi" is interpreted as one character

PRECONDITIONS:
Nokia Pure Font in use

STEPS LEADING TO PROBLEM:
1. Type to any text field (e.g. Notes, Browser)
2. Type "fi" (i.e. lowercase f and i)
3. Try to place the cursor in between the letters, either by tapping or with
magnifier

EXPECTED OUTCOME:
Cursor would move between f and i in same way as it moves between any other
letters.

ACTUAL OUTCOME:
For some reason, "fi" is interpreted as one character and it's impossible to
place the cursor in between these letters. (Note: If you change the font e.g.
when using Notes, this problem doesn't appear.)

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Small test app showing the problem attached. It seems that the problem can be reproduced with default font.