Instead of having stun armor and weight related to armor points in previous versions, mod version 18.3.2 on minecraft forge 1.18.2- 40.1.73, all armor that are not defined via datapacks have the same (15/15) stun armor and weight value.

Edit: Vanilla armors stun armor values and weight values are same
Netherite helmet had 2.25 stun armor 9 weight before,
now it has 9 stun armor and 9 weight. I don't know if this is intentional.

Example screenshots

Fixed in 18.3.3