navigami

I tried to save my office location as landmark and I take below error.

New Landmark->More->Last Known
Lat:40.590853 Lon:29.023752
Than I choose Save and get this error.
Minutes out of range [0,59]: 59.085300000000274

Editing as 40.590000 gives me below error.
Minutes out of range [0,59]: 59.000000000000034

if I enter as 40.580853 than it accepts but of course show me on the sea :)