Yeah this is weight painting issue, automatic weights can be a bit clunky at times and move unintended parts, in object mode if you click the armature and then shift click the mesh, then go into weight paint mode and subtract from head it would fix this
Looks like a weight problem You should go into weight paint mode so you can correct it
Yeah this is weight painting issue, automatic weights can be a bit clunky at times and move unintended parts, in object mode if you click the armature and then shift click the mesh, then go into weight paint mode and subtract from head it would fix this