I think there is a curse on the PN-59… I managed to get the decimals wrong for the DME: the NAV400 scale is 40 km and NAV40 is just 4 km. So in NAV40 the indicator stays at the top of the scale until you are basically on the runway.
The flight director also is not working as it should in the NAVRIKTN/NAV modes, the vertical crossbar follows the VOR radial – which is of course completely wrong as this is not supposed to simulate VOR at all.
I will issue a patch in a few days. This will also fix the status message errors.