so check the IPO of the metal parts of the door if it’s not scaled down. Something similar happened to me but with tree position it will keep resetting itself to XYZ 0,0,0, so i think in your case you have to delete the scale curve in IPO…
I found out what I did wrong, I made them children to the door, when I got rid of parint it work fine, but is there a way to make it were I can select one object and it will select all the one for the door with out messen with the texture.