QML TextInput gets confused with cursor position on QInputMethodEvent with replacement info

Scenario:

• TextInput containing a string, say "ab"
• Cursor positioned in the middle of the string, say at position 1
• Send QInputMethodEvent with replacement start -1 and length 1, commit string e.g. "c"

Excepted:

• TextInput replaces the first character with given commit string, cursor remains at the same place, i.e. at the end of newly committed string.

Actual outcome:

• TextInput replaces content correctly, but cursor jumps at the end of the content. With longer replacement length, moves twice the amount forward.

Also affects QLineEdit. QML TextEdit works ok.