I haven't used M98 before
I just looked it up the wiki
Not sure why it worked before for you but not now
The wiki says the default path is /sys and some firmware will look into /macros
So probably RRF skips /macros
The fall back into AP mode is if it can't find the network it is configured to connect to. This is helpful if you move the printer to a new location and have to setup a new network however I hope that in a future firmware release this behaviour can be made optional.