Hello,
i recently did some unrelated tests regarding IFR conditions and tried the c182s autopilot APR mode.
The NAV1 did not have a valid GS signal yet, however it locked the GS. I had expected that the GS only locks if there is a valid signal.
This may also effect the c172p, because i used its code about a ear or so.
Details here: https://github.com/HHS81/c182s/issues/302
I would be glad if someone more knowledgeable could help here...