Indeed. LATIN SMALL LETTER I + DELETE DOT ABOVE becomes LATIN CAPITAL LETTER I + DELETE DOT ABOVE in uppercase, which then becomes LATIN SMALL LETTER I + DELETE

Indeed. LATIN SMALL LETTER I + DELETE DOT ABOVE becomes LATIN CAPITAL LETTER I + DELETE DOT ABOVE in uppercase, which then becomes LATIN SMALL LETTER I + DELETE DOT ABOVE back in lowercase. The same thing applies to LATIN CAPITAL LETTER I + COMBINING DOT ABOVE. Survives infinite number of case conversions.