Hello guys
We have faced with such situations too.As usual it have happened on the airport with old equipment (north airports "for Russian users only" like USMU,USNN,UOOO and airports of the former USSR Asia's republics UCFM,UCFO,UTDD) false LOC as well as false G/S
There's some tips ,don't forget about bearing from OM,and distanse from DME if available
I have never faced it in Asia or Europe.