I don't know what causes this issue, because it doesn't generate an error. So all I can say is; Beware. It must be some mod incompatibility but I don't use any other animal mods aside Giddy up. I've had this annoying problem since 1.2 and it's a pain in the ass. Removing this mod, clearing configs, etc does nothing to remedy the issue. It will persist until you load an old savefile that never had the mod.

The issue is that as explained in the title, both of the options "Follow master while drafted" & "Follow master while doing field work" will disable itself after sometime of enabling both the features.

I originally thought it was because of Animal logics but I haven't used that mod in awhile and I started to use this mod again, and on my newer playthroughs I have consistently had this problem. I've never had this problem without Animals are fun.