If value other than 0 is entered into "RTH Home altitude" the LANDING is initiated but never gets to Landing State 1 (prevents Landing and craft just loiters)
GitHub description says...
nav_rth_home_altitude
Aircraft will climb/descend to this altitude after reaching home if landing is not enabled. Set to 0 to stay at nav_rth_altitude (default) [cm]
This may be true for other than autoland but prevents craft from doing the autoland.
Suggest adding warning in the ?-help documentation on the iNav Configurator UI