In the meantime until someone answers, set up a new rig (with CAT its just a click) add ear bones. Test the new rig to see if it suffers the same malady. If the new rig works (and it should) then try discover the differences between the simple rig and your working rig.
Hi guys! I'm using 3DS Max 2018 for creating simple game character animation and I've encountered an issue for wich i can't find any solution so far. Character (cat) has an ear bones made as head bone's childs (screenshot 1). Everything's works fine in setup mode, but if i turn on animation mode ear bones pivots and bones…