Inheritance bug makes me mad

I have a parent unit with skletal mesh set to -120 location & -90 rotation on Z Axis & Animation Blueprint also but after one of the saves some of the child units began to spawn with 0 on Z an no animation blueprint. I have tried to fix them manualy , I vave tried to delete them and to make new child classes , I have tried to set new parametres in parent BP - everyting is working , I’m saving, I’m restaring ue4 and getting sme problem with the same classes those broken child units just floating in the air in an A-pose.
Is any way I can fix this problem without setting broken parametres on event begin play?